./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/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_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/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_56a4e098-398a-4b3f-801b-b58d78b8beef/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 e02ca79ae11b312cb156178ccd52c5da7b51884a938996d16b5a625457869bce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:48,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:48,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:47:48,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:48,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:48,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:48,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:48,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:48,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:48,900 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:48,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:48,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:48,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:48,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:48,905 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:48,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:48,906 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:48,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:48,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:48,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:48,909 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:47:48,911 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:47:48,911 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:47:48,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:48,912 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:47:48,913 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:47:48,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:48,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:48,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:48,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:48,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:48,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:48,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:48,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:48,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:48,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:48,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:48,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:48,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:48,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:48,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:48,923 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_56a4e098-398a-4b3f-801b-b58d78b8beef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e02ca79ae11b312cb156178ccd52c5da7b51884a938996d16b5a625457869bce [2023-11-26 10:47:49,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:49,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:49,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:49,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:49,365 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:49,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-11-26 10:47:52,727 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:53,074 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:53,074 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-11-26 10:47:53,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/data/3fb2d5a2c/4ffb159a56504a88bcb49a267a162ebc/FLAG326d9c38a [2023-11-26 10:47:53,124 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/data/3fb2d5a2c/4ffb159a56504a88bcb49a267a162ebc [2023-11-26 10:47:53,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:53,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:53,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:53,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:53,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:53,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eba909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53, skipping insertion in model container [2023-11-26 10:47:53,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,215 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:53,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:53,734 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:53,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:53,845 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:47:53,845 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:47:53,853 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:53,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53 WrapperNode [2023-11-26 10:47:53,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:53,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:53,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:53,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:53,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,904 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2023-11-26 10:47:53,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:53,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:53,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:53,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:53,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,939 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 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 10:47:53,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:53,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:53,961 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:53,961 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:53,962 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (1/1) ... [2023-11-26 10:47:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:54,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:54,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:47:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:47:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:47:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:47:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:47:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:47:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:47:54,049 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-26 10:47:54,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-26 10:47:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-26 10:47:54,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-26 10:47:54,052 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:47:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:47:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:54,055 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:47:54,220 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:54,223 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:54,605 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:54,738 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:54,739 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 10:47:54,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:54 BoogieIcfgContainer [2023-11-26 10:47:54,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:54,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:54,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:54,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:54,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:53" (1/3) ... [2023-11-26 10:47:54,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2262a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:54, skipping insertion in model container [2023-11-26 10:47:54,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:53" (2/3) ... [2023-11-26 10:47:54,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2262a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:54, skipping insertion in model container [2023-11-26 10:47:54,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:54" (3/3) ... [2023-11-26 10:47:54,752 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-11-26 10:47:54,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:54,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-26 10:47:54,780 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:47:54,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 10:47:54,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 51 transitions, 114 flow [2023-11-26 10:47:54,954 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-26 10:47:54,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:47:54,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-26 10:47:54,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 51 transitions, 114 flow [2023-11-26 10:47:54,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 47 transitions, 103 flow [2023-11-26 10:47:54,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:55,009 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;@26ad5df3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:55,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-26 10:47:55,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:47:55,015 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 10:47:55,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:47:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:55,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:47:55,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:55,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash 7273, now seen corresponding path program 1 times [2023-11-26 10:47:55,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911148041] [2023-11-26 10:47:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:55,404 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 10:47:55,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911148041] [2023-11-26 10:47:55,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911148041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:47:55,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982205723] [2023-11-26 10:47:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:55,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:55,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 51 [2023-11-26 10:47:55,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:55,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 51 [2023-11-26 10:47:55,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:55,627 INFO L124 PetriNetUnfolderBase]: 75/243 cut-off events. [2023-11-26 10:47:55,627 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:47:55,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 243 events. 75/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1342 event pairs, 63 based on Foata normal form. 16/230 useless extension candidates. Maximal degree in co-relation 385. Up to 117 conditions per place. [2023-11-26 10:47:55,635 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 16 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-26 10:47:55,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 137 flow [2023-11-26 10:47:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-26 10:47:55,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7450980392156863 [2023-11-26 10:47:55,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:55,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,673 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 103 flow. Second operand 3 states and 114 transitions. [2023-11-26 10:47:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 137 flow [2023-11-26 10:47:55,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:47:55,683 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 96 flow [2023-11-26 10:47:55,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-11-26 10:47:55,690 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-11-26 10:47:55,691 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 96 flow [2023-11-26 10:47:55,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:55,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:47:55,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:55,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:55,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash 7274, now seen corresponding path program 1 times [2023-11-26 10:47:55,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:55,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328446982] [2023-11-26 10:47:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:55,825 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 10:47:55,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328446982] [2023-11-26 10:47:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328446982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:55,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:55,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:47:55,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485483687] [2023-11-26 10:47:55,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:55,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 51 [2023-11-26 10:47:55,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:55,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 51 [2023-11-26 10:47:55,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:55,959 INFO L124 PetriNetUnfolderBase]: 75/242 cut-off events. [2023-11-26 10:47:55,959 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 10:47:55,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 242 events. 75/242 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1325 event pairs, 63 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 393. Up to 116 conditions per place. [2023-11-26 10:47:55,965 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 15 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-26 10:47:55,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 134 flow [2023-11-26 10:47:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-26 10:47:55,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7450980392156863 [2023-11-26 10:47:55,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:55,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-26 10:47:55,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,973 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 96 flow. Second operand 3 states and 114 transitions. [2023-11-26 10:47:55,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 134 flow [2023-11-26 10:47:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:55,977 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 94 flow [2023-11-26 10:47:55,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-11-26 10:47:55,978 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-11-26 10:47:55,978 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 94 flow [2023-11-26 10:47:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:55,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:47:55,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:55,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:55,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:55,981 INFO L85 PathProgramCache]: Analyzing trace with hash 216876920, now seen corresponding path program 1 times [2023-11-26 10:47:55,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:55,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106335627] [2023-11-26 10:47:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:55,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:56,066 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 10:47:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106335627] [2023-11-26 10:47:56,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106335627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:56,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:56,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794447787] [2023-11-26 10:47:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:56,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 51 [2023-11-26 10:47:56,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:56,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 51 [2023-11-26 10:47:56,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:56,194 INFO L124 PetriNetUnfolderBase]: 76/240 cut-off events. [2023-11-26 10:47:56,194 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 10:47:56,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 240 events. 76/240 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1313 event pairs, 63 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 394. Up to 116 conditions per place. [2023-11-26 10:47:56,199 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 16 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-26 10:47:56,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 134 flow [2023-11-26 10:47:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 10:47:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320261437908496 [2023-11-26 10:47:56,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:56,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,206 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 94 flow. Second operand 3 states and 112 transitions. [2023-11-26 10:47:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 134 flow [2023-11-26 10:47:56,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:56,209 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 92 flow [2023-11-26 10:47:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-26 10:47:56,211 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-11-26 10:47:56,211 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 92 flow [2023-11-26 10:47:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:56,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:47:56,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:47:56,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:56,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash 216876921, now seen corresponding path program 1 times [2023-11-26 10:47:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:56,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42666841] [2023-11-26 10:47:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:56,324 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 10:47:56,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42666841] [2023-11-26 10:47:56,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42666841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:56,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243719726] [2023-11-26 10:47:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:56,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 51 [2023-11-26 10:47:56,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:56,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 51 [2023-11-26 10:47:56,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:56,429 INFO L124 PetriNetUnfolderBase]: 75/238 cut-off events. [2023-11-26 10:47:56,429 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 10:47:56,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 238 events. 75/238 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1298 event pairs, 42 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 391. Up to 113 conditions per place. [2023-11-26 10:47:56,433 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 15 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-26 10:47:56,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 130 flow [2023-11-26 10:47:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-26 10:47:56,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7450980392156863 [2023-11-26 10:47:56,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-26 10:47:56,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-26 10:47:56,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:56,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-26 10:47:56,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,440 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 92 flow. Second operand 3 states and 114 transitions. [2023-11-26 10:47:56,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 130 flow [2023-11-26 10:47:56,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:56,442 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 90 flow [2023-11-26 10:47:56,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-26 10:47:56,444 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -6 predicate places. [2023-11-26 10:47:56,444 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 90 flow [2023-11-26 10:47:56,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:56,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:56,445 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:56,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1349715253, now seen corresponding path program 1 times [2023-11-26 10:47:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:56,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789250626] [2023-11-26 10:47:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:56,579 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 10:47:56,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789250626] [2023-11-26 10:47:56,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789250626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:56,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603272723] [2023-11-26 10:47:56,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:56,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 51 [2023-11-26 10:47:56,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:56,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 51 [2023-11-26 10:47:56,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:56,755 INFO L124 PetriNetUnfolderBase]: 79/238 cut-off events. [2023-11-26 10:47:56,755 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 10:47:56,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 238 events. 79/238 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1301 event pairs, 27 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 399. Up to 112 conditions per place. [2023-11-26 10:47:56,759 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 16 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-26 10:47:56,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 130 flow [2023-11-26 10:47:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 10:47:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320261437908496 [2023-11-26 10:47:56,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:56,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 10:47:56,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,769 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 90 flow. Second operand 3 states and 112 transitions. [2023-11-26 10:47:56,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 130 flow [2023-11-26 10:47:56,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 42 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:56,773 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 88 flow [2023-11-26 10:47:56,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-26 10:47:56,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-11-26 10:47:56,778 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 88 flow [2023-11-26 10:47:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:56,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:47:56,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:56,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1349715254, now seen corresponding path program 1 times [2023-11-26 10:47:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:56,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915744292] [2023-11-26 10:47:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:56,959 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 10:47:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915744292] [2023-11-26 10:47:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915744292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:56,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:56,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959506089] [2023-11-26 10:47:56,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:56,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:56,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 51 [2023-11-26 10:47:56,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 51 [2023-11-26 10:47:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:57,059 INFO L124 PetriNetUnfolderBase]: 75/219 cut-off events. [2023-11-26 10:47:57,059 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 10:47:57,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 219 events. 75/219 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1119 event pairs, 60 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 374. Up to 104 conditions per place. [2023-11-26 10:47:57,063 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 15 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-26 10:47:57,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 126 flow [2023-11-26 10:47:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-26 10:47:57,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7450980392156863 [2023-11-26 10:47:57,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-26 10:47:57,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-26 10:47:57,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:57,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-26 10:47:57,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:57,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:57,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:57,096 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 88 flow. Second operand 3 states and 114 transitions. [2023-11-26 10:47:57,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 126 flow [2023-11-26 10:47:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:57,099 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 86 flow [2023-11-26 10:47:57,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-26 10:47:57,100 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-11-26 10:47:57,100 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 86 flow [2023-11-26 10:47:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:57,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:57,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:57,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:47:57,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:57,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash -218343394, now seen corresponding path program 1 times [2023-11-26 10:47:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805723294] [2023-11-26 10:47:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:57,869 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 10:47:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:57,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805723294] [2023-11-26 10:47:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805723294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864575560] [2023-11-26 10:47:57,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:58,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 51 [2023-11-26 10:47:58,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:58,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 51 [2023-11-26 10:47:58,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:58,493 INFO L124 PetriNetUnfolderBase]: 206/539 cut-off events. [2023-11-26 10:47:58,494 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-26 10:47:58,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 539 events. 206/539 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3680 event pairs, 62 based on Foata normal form. 12/531 useless extension candidates. Maximal degree in co-relation 941. Up to 151 conditions per place. [2023-11-26 10:47:58,502 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 31 selfloop transitions, 5 changer transitions 6/63 dead transitions. [2023-11-26 10:47:58,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 230 flow [2023-11-26 10:47:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:47:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 253 transitions. [2023-11-26 10:47:58,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7086834733893558 [2023-11-26 10:47:58,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 253 transitions. [2023-11-26 10:47:58,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 253 transitions. [2023-11-26 10:47:58,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:58,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 253 transitions. [2023-11-26 10:47:58,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 36.142857142857146) internal successors, (253), 7 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,512 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 86 flow. Second operand 7 states and 253 transitions. [2023-11-26 10:47:58,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 230 flow [2023-11-26 10:47:58,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:58,517 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 110 flow [2023-11-26 10:47:58,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=110, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-11-26 10:47:58,519 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-11-26 10:47:58,519 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 110 flow [2023-11-26 10:47:58,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:58,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:58,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:58,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:58,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash -218342078, now seen corresponding path program 1 times [2023-11-26 10:47:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:58,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13974394] [2023-11-26 10:47:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:58,823 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 10:47:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:58,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13974394] [2023-11-26 10:47:58,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13974394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:58,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:58,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595766632] [2023-11-26 10:47:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:58,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 51 [2023-11-26 10:47:58,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:58,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:58,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 51 [2023-11-26 10:47:58,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:59,649 INFO L124 PetriNetUnfolderBase]: 1801/3597 cut-off events. [2023-11-26 10:47:59,649 INFO L125 PetriNetUnfolderBase]: For 403/405 co-relation queries the response was YES. [2023-11-26 10:47:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 3597 events. 1801/3597 cut-off events. For 403/405 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29733 event pairs, 502 based on Foata normal form. 0/3447 useless extension candidates. Maximal degree in co-relation 6908. Up to 1176 conditions per place. [2023-11-26 10:47:59,692 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 56 selfloop transitions, 22 changer transitions 7/103 dead transitions. [2023-11-26 10:47:59,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 458 flow [2023-11-26 10:47:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:47:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 326 transitions. [2023-11-26 10:47:59,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.710239651416122 [2023-11-26 10:47:59,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 326 transitions. [2023-11-26 10:47:59,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 326 transitions. [2023-11-26 10:47:59,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:59,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 326 transitions. [2023-11-26 10:47:59,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 36.22222222222222) internal successors, (326), 9 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:59,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:59,701 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:59,702 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 110 flow. Second operand 9 states and 326 transitions. [2023-11-26 10:47:59,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 458 flow [2023-11-26 10:47:59,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 10:47:59,709 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 281 flow [2023-11-26 10:47:59,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=281, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-26 10:47:59,710 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-11-26 10:47:59,711 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 281 flow [2023-11-26 10:47:59,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:59,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:59,711 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] [2023-11-26 10:47:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:47:59,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:47:59,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1355282911, now seen corresponding path program 1 times [2023-11-26 10:47:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551666405] [2023-11-26 10:47:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:59,993 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 10:47:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551666405] [2023-11-26 10:47:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551666405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:59,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:59,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:47:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884290648] [2023-11-26 10:47:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:59,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:59,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:00,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 51 [2023-11-26 10:48:00,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:00,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:00,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 51 [2023-11-26 10:48:00,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:01,052 INFO L124 PetriNetUnfolderBase]: 2098/4213 cut-off events. [2023-11-26 10:48:01,053 INFO L125 PetriNetUnfolderBase]: For 6380/6404 co-relation queries the response was YES. [2023-11-26 10:48:01,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12302 conditions, 4213 events. 2098/4213 cut-off events. For 6380/6404 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36527 event pairs, 241 based on Foata normal form. 110/4292 useless extension candidates. Maximal degree in co-relation 12281. Up to 963 conditions per place. [2023-11-26 10:48:01,109 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 70 selfloop transitions, 43 changer transitions 13/144 dead transitions. [2023-11-26 10:48:01,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 144 transitions, 1010 flow [2023-11-26 10:48:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:48:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:48:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 425 transitions. [2023-11-26 10:48:01,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-26 10:48:01,113 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 425 transitions. [2023-11-26 10:48:01,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 425 transitions. [2023-11-26 10:48:01,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:01,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 425 transitions. [2023-11-26 10:48:01,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 35.416666666666664) internal successors, (425), 12 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,118 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,119 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 281 flow. Second operand 12 states and 425 transitions. [2023-11-26 10:48:01,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 144 transitions, 1010 flow [2023-11-26 10:48:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 144 transitions, 1006 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 10:48:01,168 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 622 flow [2023-11-26 10:48:01,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=622, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-26 10:48:01,170 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2023-11-26 10:48:01,170 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 622 flow [2023-11-26 10:48:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:01,171 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] [2023-11-26 10:48:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:48:01,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:01,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1380296213, now seen corresponding path program 1 times [2023-11-26 10:48:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220713172] [2023-11-26 10:48:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:01,382 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 10:48:01,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220713172] [2023-11-26 10:48:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220713172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:01,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:01,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224182008] [2023-11-26 10:48:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:01,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 51 [2023-11-26 10:48:01,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 622 flow. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:01,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:01,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 51 [2023-11-26 10:48:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:02,535 INFO L124 PetriNetUnfolderBase]: 2229/4389 cut-off events. [2023-11-26 10:48:02,535 INFO L125 PetriNetUnfolderBase]: For 12493/12529 co-relation queries the response was YES. [2023-11-26 10:48:02,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15238 conditions, 4389 events. 2229/4389 cut-off events. For 12493/12529 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38307 event pairs, 282 based on Foata normal form. 62/4387 useless extension candidates. Maximal degree in co-relation 15208. Up to 1259 conditions per place. [2023-11-26 10:48:02,666 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 68 selfloop transitions, 41 changer transitions 43/170 dead transitions. [2023-11-26 10:48:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1500 flow [2023-11-26 10:48:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:48:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:48:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 421 transitions. [2023-11-26 10:48:02,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6879084967320261 [2023-11-26 10:48:02,669 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 421 transitions. [2023-11-26 10:48:02,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 421 transitions. [2023-11-26 10:48:02,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:02,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 421 transitions. [2023-11-26 10:48:02,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 35.083333333333336) internal successors, (421), 12 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:02,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:02,673 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:02,673 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 622 flow. Second operand 12 states and 421 transitions. [2023-11-26 10:48:02,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1500 flow [2023-11-26 10:48:02,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1464 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-26 10:48:02,871 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 732 flow [2023-11-26 10:48:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=732, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-11-26 10:48:02,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2023-11-26 10:48:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 732 flow [2023-11-26 10:48:02,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:02,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:02,873 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] [2023-11-26 10:48:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:48:02,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:02,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 817299743, now seen corresponding path program 1 times [2023-11-26 10:48:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:02,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160885929] [2023-11-26 10:48:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:03,438 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 10:48:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160885929] [2023-11-26 10:48:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160885929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:03,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:03,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:48:03,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244322421] [2023-11-26 10:48:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:03,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:48:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:48:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:48:03,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 51 [2023-11-26 10:48:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 732 flow. Second operand has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 51 [2023-11-26 10:48:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:04,812 INFO L124 PetriNetUnfolderBase]: 2177/5211 cut-off events. [2023-11-26 10:48:04,813 INFO L125 PetriNetUnfolderBase]: For 17037/17175 co-relation queries the response was YES. [2023-11-26 10:48:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17862 conditions, 5211 events. 2177/5211 cut-off events. For 17037/17175 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 52038 event pairs, 1363 based on Foata normal form. 134/5043 useless extension candidates. Maximal degree in co-relation 17823. Up to 1031 conditions per place. [2023-11-26 10:48:04,897 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 66 selfloop transitions, 13 changer transitions 12/140 dead transitions. [2023-11-26 10:48:04,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 1288 flow [2023-11-26 10:48:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:48:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 290 transitions. [2023-11-26 10:48:04,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318082788671024 [2023-11-26 10:48:04,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 290 transitions. [2023-11-26 10:48:04,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 290 transitions. [2023-11-26 10:48:04,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:04,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 290 transitions. [2023-11-26 10:48:04,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 32.22222222222222) internal successors, (290), 9 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:04,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:04,905 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:04,905 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 732 flow. Second operand 9 states and 290 transitions. [2023-11-26 10:48:04,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 1288 flow [2023-11-26 10:48:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1103 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-11-26 10:48:05,198 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 745 flow [2023-11-26 10:48:05,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=745, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2023-11-26 10:48:05,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-11-26 10:48:05,199 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 745 flow [2023-11-26 10:48:05,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:05,200 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] [2023-11-26 10:48:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:48:05,201 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:05,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1706121304, now seen corresponding path program 1 times [2023-11-26 10:48:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468143575] [2023-11-26 10:48:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:05,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:05,461 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 10:48:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468143575] [2023-11-26 10:48:05,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468143575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:05,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:05,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:05,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155157664] [2023-11-26 10:48:05,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:05,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:05,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:05,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 51 [2023-11-26 10:48:05,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 745 flow. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:05,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:05,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 51 [2023-11-26 10:48:05,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:07,385 INFO L124 PetriNetUnfolderBase]: 4324/8628 cut-off events. [2023-11-26 10:48:07,397 INFO L125 PetriNetUnfolderBase]: For 25495/25511 co-relation queries the response was YES. [2023-11-26 10:48:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29585 conditions, 8628 events. 4324/8628 cut-off events. For 25495/25511 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 81722 event pairs, 519 based on Foata normal form. 58/8664 useless extension candidates. Maximal degree in co-relation 29548. Up to 1551 conditions per place. [2023-11-26 10:48:07,502 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 87 selfloop transitions, 47 changer transitions 145/296 dead transitions. [2023-11-26 10:48:07,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 296 transitions, 2911 flow [2023-11-26 10:48:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:48:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 10:48:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 590 transitions. [2023-11-26 10:48:07,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805074971164936 [2023-11-26 10:48:07,507 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 590 transitions. [2023-11-26 10:48:07,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 590 transitions. [2023-11-26 10:48:07,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:07,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 590 transitions. [2023-11-26 10:48:07,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 34.705882352941174) internal successors, (590), 17 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:07,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:07,514 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:07,514 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 745 flow. Second operand 17 states and 590 transitions. [2023-11-26 10:48:07,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 296 transitions, 2911 flow [2023-11-26 10:48:07,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 296 transitions, 2875 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-26 10:48:07,813 INFO L231 Difference]: Finished difference. Result has 125 places, 99 transitions, 1017 flow [2023-11-26 10:48:07,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1017, PETRI_PLACES=125, PETRI_TRANSITIONS=99} [2023-11-26 10:48:07,814 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-11-26 10:48:07,815 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 99 transitions, 1017 flow [2023-11-26 10:48:07,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:07,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:07,815 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] [2023-11-26 10:48:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:48:07,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1270220396, now seen corresponding path program 2 times [2023-11-26 10:48:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333690872] [2023-11-26 10:48:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:08,007 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 10:48:08,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333690872] [2023-11-26 10:48:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333690872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:08,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049476833] [2023-11-26 10:48:08,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:08,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:08,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:08,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 51 [2023-11-26 10:48:08,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 99 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:08,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:08,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 51 [2023-11-26 10:48:08,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:09,343 INFO L124 PetriNetUnfolderBase]: 2820/5946 cut-off events. [2023-11-26 10:48:09,343 INFO L125 PetriNetUnfolderBase]: For 28822/28853 co-relation queries the response was YES. [2023-11-26 10:48:09,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22587 conditions, 5946 events. 2820/5946 cut-off events. For 28822/28853 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 55204 event pairs, 691 based on Foata normal form. 93/5957 useless extension candidates. Maximal degree in co-relation 22537. Up to 1681 conditions per place. [2023-11-26 10:48:09,412 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 82 selfloop transitions, 38 changer transitions 24/167 dead transitions. [2023-11-26 10:48:09,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 167 transitions, 1810 flow [2023-11-26 10:48:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:48:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:48:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 412 transitions. [2023-11-26 10:48:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673202614379085 [2023-11-26 10:48:09,415 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 412 transitions. [2023-11-26 10:48:09,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 412 transitions. [2023-11-26 10:48:09,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:09,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 412 transitions. [2023-11-26 10:48:09,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 34.333333333333336) internal successors, (412), 12 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,419 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,419 INFO L175 Difference]: Start difference. First operand has 125 places, 99 transitions, 1017 flow. Second operand 12 states and 412 transitions. [2023-11-26 10:48:09,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 167 transitions, 1810 flow [2023-11-26 10:48:09,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 167 transitions, 1645 flow, removed 61 selfloop flow, removed 13 redundant places. [2023-11-26 10:48:09,661 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 1112 flow [2023-11-26 10:48:09,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1112, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2023-11-26 10:48:09,662 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-11-26 10:48:09,662 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 1112 flow [2023-11-26 10:48:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:09,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:09,663 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] [2023-11-26 10:48:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:48:09,663 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:09,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2075223766, now seen corresponding path program 1 times [2023-11-26 10:48:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652864775] [2023-11-26 10:48:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:09,998 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 10:48:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652864775] [2023-11-26 10:48:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652864775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:48:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598511610] [2023-11-26 10:48:10,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:48:10,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:48:10,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:48:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 51 [2023-11-26 10:48:10,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 1112 flow. Second operand has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:10,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 51 [2023-11-26 10:48:10,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:10,686 INFO L124 PetriNetUnfolderBase]: 1230/3282 cut-off events. [2023-11-26 10:48:10,686 INFO L125 PetriNetUnfolderBase]: For 14364/14912 co-relation queries the response was YES. [2023-11-26 10:48:10,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11392 conditions, 3282 events. 1230/3282 cut-off events. For 14364/14912 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32400 event pairs, 609 based on Foata normal form. 120/3173 useless extension candidates. Maximal degree in co-relation 11337. Up to 1709 conditions per place. [2023-11-26 10:48:10,733 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 18 selfloop transitions, 8 changer transitions 23/107 dead transitions. [2023-11-26 10:48:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 107 transitions, 1200 flow [2023-11-26 10:48:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:48:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2023-11-26 10:48:10,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6241830065359477 [2023-11-26 10:48:10,735 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 191 transitions. [2023-11-26 10:48:10,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 191 transitions. [2023-11-26 10:48:10,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:10,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 191 transitions. [2023-11-26 10:48:10,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,738 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,738 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 1112 flow. Second operand 6 states and 191 transitions. [2023-11-26 10:48:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 107 transitions, 1200 flow [2023-11-26 10:48:10,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 107 transitions, 1102 flow, removed 13 selfloop flow, removed 15 redundant places. [2023-11-26 10:48:10,852 INFO L231 Difference]: Finished difference. Result has 112 places, 81 transitions, 774 flow [2023-11-26 10:48:10,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=112, PETRI_TRANSITIONS=81} [2023-11-26 10:48:10,853 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2023-11-26 10:48:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 81 transitions, 774 flow [2023-11-26 10:48:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:10,853 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] [2023-11-26 10:48:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:48:10,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -365167496, now seen corresponding path program 1 times [2023-11-26 10:48:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:10,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135220512] [2023-11-26 10:48:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:10,998 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 10:48:10,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135220512] [2023-11-26 10:48:10,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135220512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:10,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:10,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:48:10,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339003070] [2023-11-26 10:48:10,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:11,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:11,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 51 [2023-11-26 10:48:11,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 81 transitions, 774 flow. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:11,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:11,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 51 [2023-11-26 10:48:11,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:11,963 INFO L124 PetriNetUnfolderBase]: 2106/4593 cut-off events. [2023-11-26 10:48:11,964 INFO L125 PetriNetUnfolderBase]: For 21223/21545 co-relation queries the response was YES. [2023-11-26 10:48:12,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15885 conditions, 4593 events. 2106/4593 cut-off events. For 21223/21545 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 42519 event pairs, 512 based on Foata normal form. 89/4606 useless extension candidates. Maximal degree in co-relation 15837. Up to 1343 conditions per place. [2023-11-26 10:48:12,020 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 37 selfloop transitions, 9 changer transitions 62/136 dead transitions. [2023-11-26 10:48:12,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 136 transitions, 1222 flow [2023-11-26 10:48:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:48:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 10:48:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 444 transitions. [2023-11-26 10:48:12,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.669683257918552 [2023-11-26 10:48:12,024 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 444 transitions. [2023-11-26 10:48:12,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 444 transitions. [2023-11-26 10:48:12,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:12,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 444 transitions. [2023-11-26 10:48:12,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 34.15384615384615) internal successors, (444), 13 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,029 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,029 INFO L175 Difference]: Start difference. First operand has 112 places, 81 transitions, 774 flow. Second operand 13 states and 444 transitions. [2023-11-26 10:48:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 136 transitions, 1222 flow [2023-11-26 10:48:12,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 136 transitions, 1122 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-11-26 10:48:12,124 INFO L231 Difference]: Finished difference. Result has 114 places, 64 transitions, 544 flow [2023-11-26 10:48:12,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=544, PETRI_PLACES=114, PETRI_TRANSITIONS=64} [2023-11-26 10:48:12,125 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2023-11-26 10:48:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 64 transitions, 544 flow [2023-11-26 10:48:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:12,126 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] [2023-11-26 10:48:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:48:12,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:12,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1136209503, now seen corresponding path program 1 times [2023-11-26 10:48:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:12,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86221665] [2023-11-26 10:48:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:12,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:12,329 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 10:48:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86221665] [2023-11-26 10:48:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86221665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:48:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073373813] [2023-11-26 10:48:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:12,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 51 [2023-11-26 10:48:12,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 64 transitions, 544 flow. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:12,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 51 [2023-11-26 10:48:12,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:12,967 INFO L124 PetriNetUnfolderBase]: 1559/3563 cut-off events. [2023-11-26 10:48:12,967 INFO L125 PetriNetUnfolderBase]: For 16359/16386 co-relation queries the response was YES. [2023-11-26 10:48:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11968 conditions, 3563 events. 1559/3563 cut-off events. For 16359/16386 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31915 event pairs, 293 based on Foata normal form. 110/3618 useless extension candidates. Maximal degree in co-relation 11935. Up to 1184 conditions per place. [2023-11-26 10:48:12,993 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 32 selfloop transitions, 8 changer transitions 44/102 dead transitions. [2023-11-26 10:48:12,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 983 flow [2023-11-26 10:48:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:48:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:48:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 241 transitions. [2023-11-26 10:48:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6750700280112045 [2023-11-26 10:48:12,995 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 241 transitions. [2023-11-26 10:48:12,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 241 transitions. [2023-11-26 10:48:12,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:12,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 241 transitions. [2023-11-26 10:48:12,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,999 INFO L175 Difference]: Start difference. First operand has 114 places, 64 transitions, 544 flow. Second operand 7 states and 241 transitions. [2023-11-26 10:48:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 102 transitions, 983 flow [2023-11-26 10:48:13,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 887 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-11-26 10:48:13,053 INFO L231 Difference]: Finished difference. Result has 91 places, 46 transitions, 319 flow [2023-11-26 10:48:13,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=319, PETRI_PLACES=91, PETRI_TRANSITIONS=46} [2023-11-26 10:48:13,054 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-11-26 10:48:13,054 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 46 transitions, 319 flow [2023-11-26 10:48:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:13,055 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] [2023-11-26 10:48:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:48:13,055 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2078390995, now seen corresponding path program 2 times [2023-11-26 10:48:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574337786] [2023-11-26 10:48:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:13,215 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 10:48:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:13,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574337786] [2023-11-26 10:48:13,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574337786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:13,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:13,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157045982] [2023-11-26 10:48:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:13,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 51 [2023-11-26 10:48:13,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 46 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 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 10:48:13,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:13,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 51 [2023-11-26 10:48:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:13,497 INFO L124 PetriNetUnfolderBase]: 513/1225 cut-off events. [2023-11-26 10:48:13,498 INFO L125 PetriNetUnfolderBase]: For 4525/4584 co-relation queries the response was YES. [2023-11-26 10:48:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3854 conditions, 1225 events. 513/1225 cut-off events. For 4525/4584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9216 event pairs, 80 based on Foata normal form. 52/1224 useless extension candidates. Maximal degree in co-relation 3827. Up to 326 conditions per place. [2023-11-26 10:48:13,508 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 21 selfloop transitions, 3 changer transitions 32/75 dead transitions. [2023-11-26 10:48:13,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 75 transitions, 563 flow [2023-11-26 10:48:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:48:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:48:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 276 transitions. [2023-11-26 10:48:13,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2023-11-26 10:48:13,511 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 276 transitions. [2023-11-26 10:48:13,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 276 transitions. [2023-11-26 10:48:13,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:13,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 276 transitions. [2023-11-26 10:48:13,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,517 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,517 INFO L175 Difference]: Start difference. First operand has 91 places, 46 transitions, 319 flow. Second operand 8 states and 276 transitions. [2023-11-26 10:48:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 75 transitions, 563 flow [2023-11-26 10:48:13,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 433 flow, removed 42 selfloop flow, removed 18 redundant places. [2023-11-26 10:48:13,531 INFO L231 Difference]: Finished difference. Result has 83 places, 36 transitions, 169 flow [2023-11-26 10:48:13,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=169, PETRI_PLACES=83, PETRI_TRANSITIONS=36} [2023-11-26 10:48:13,533 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2023-11-26 10:48:13,533 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 36 transitions, 169 flow [2023-11-26 10:48:13,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 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 10:48:13,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:13,533 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] [2023-11-26 10:48:13,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:48:13,534 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash 117512375, now seen corresponding path program 1 times [2023-11-26 10:48:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110830950] [2023-11-26 10:48:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:13,660 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 10:48:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110830950] [2023-11-26 10:48:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110830950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:13,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:13,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734533186] [2023-11-26 10:48:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:13,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 51 [2023-11-26 10:48:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 36 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 51 [2023-11-26 10:48:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:13,785 INFO L124 PetriNetUnfolderBase]: 332/652 cut-off events. [2023-11-26 10:48:13,785 INFO L125 PetriNetUnfolderBase]: For 578/592 co-relation queries the response was YES. [2023-11-26 10:48:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 652 events. 332/652 cut-off events. For 578/592 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3430 event pairs, 82 based on Foata normal form. 27/652 useless extension candidates. Maximal degree in co-relation 1504. Up to 339 conditions per place. [2023-11-26 10:48:13,791 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 21 selfloop transitions, 4 changer transitions 4/47 dead transitions. [2023-11-26 10:48:13,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 47 transitions, 249 flow [2023-11-26 10:48:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:48:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-26 10:48:13,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7156862745098039 [2023-11-26 10:48:13,793 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-26 10:48:13,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-26 10:48:13,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:13,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-26 10:48:13,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,797 INFO L175 Difference]: Start difference. First operand has 83 places, 36 transitions, 169 flow. Second operand 4 states and 146 transitions. [2023-11-26 10:48:13,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 47 transitions, 249 flow [2023-11-26 10:48:13,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 47 transitions, 185 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-11-26 10:48:13,801 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 133 flow [2023-11-26 10:48:13,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-11-26 10:48:13,802 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-11-26 10:48:13,802 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 133 flow [2023-11-26 10:48:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:13,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:13,803 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] [2023-11-26 10:48:13,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:48:13,803 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:13,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2009083220, now seen corresponding path program 1 times [2023-11-26 10:48:13,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:13,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750792260] [2023-11-26 10:48:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:13,990 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 10:48:13,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750792260] [2023-11-26 10:48:13,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750792260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:13,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:13,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735508488] [2023-11-26 10:48:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:13,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:13,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 51 [2023-11-26 10:48:14,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 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 10:48:14,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:14,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 51 [2023-11-26 10:48:14,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:14,118 INFO L124 PetriNetUnfolderBase]: 222/451 cut-off events. [2023-11-26 10:48:14,118 INFO L125 PetriNetUnfolderBase]: For 172/217 co-relation queries the response was YES. [2023-11-26 10:48:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 451 events. 222/451 cut-off events. For 172/217 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2046 event pairs, 22 based on Foata normal form. 27/462 useless extension candidates. Maximal degree in co-relation 1091. Up to 197 conditions per place. [2023-11-26 10:48:14,121 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 20 selfloop transitions, 6 changer transitions 8/52 dead transitions. [2023-11-26 10:48:14,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 52 transitions, 244 flow [2023-11-26 10:48:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:48:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-26 10:48:14,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2023-11-26 10:48:14,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-26 10:48:14,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-26 10:48:14,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:14,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-26 10:48:14,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,127 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 133 flow. Second operand 5 states and 180 transitions. [2023-11-26 10:48:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 52 transitions, 244 flow [2023-11-26 10:48:14,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 52 transitions, 235 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 10:48:14,133 INFO L231 Difference]: Finished difference. Result has 66 places, 38 transitions, 151 flow [2023-11-26 10:48:14,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=66, PETRI_TRANSITIONS=38} [2023-11-26 10:48:14,134 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-11-26 10:48:14,134 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 38 transitions, 151 flow [2023-11-26 10:48:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 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 10:48:14,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:14,135 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 10:48:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:48:14,135 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:48:14,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1203447025, now seen corresponding path program 1 times [2023-11-26 10:48:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948514672] [2023-11-26 10:48:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:14,310 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 10:48:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948514672] [2023-11-26 10:48:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948514672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963150945] [2023-11-26 10:48:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 51 [2023-11-26 10:48:14,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 38 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:14,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 51 [2023-11-26 10:48:14,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:14,413 INFO L124 PetriNetUnfolderBase]: 76/165 cut-off events. [2023-11-26 10:48:14,413 INFO L125 PetriNetUnfolderBase]: For 166/215 co-relation queries the response was YES. [2023-11-26 10:48:14,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 165 events. 76/165 cut-off events. For 166/215 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 479 event pairs, 2 based on Foata normal form. 16/177 useless extension candidates. Maximal degree in co-relation 436. Up to 56 conditions per place. [2023-11-26 10:48:14,414 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-11-26 10:48:14,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 43 transitions, 213 flow [2023-11-26 10:48:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:48:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2023-11-26 10:48:14,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 10:48:14,417 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 204 transitions. [2023-11-26 10:48:14,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 204 transitions. [2023-11-26 10:48:14,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:14,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 204 transitions. [2023-11-26 10:48:14,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,420 INFO L175 Difference]: Start difference. First operand has 66 places, 38 transitions, 151 flow. Second operand 6 states and 204 transitions. [2023-11-26 10:48:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 43 transitions, 213 flow [2023-11-26 10:48:14,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 43 transitions, 185 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-26 10:48:14,422 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-11-26 10:48:14,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-11-26 10:48:14,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-11-26 10:48:14,423 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-11-26 10:48:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:14,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-11-26 10:48:14,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-11-26 10:48:14,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-11-26 10:48:14,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-11-26 10:48:14,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-11-26 10:48:14,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-11-26 10:48:14,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-11-26 10:48:14,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-11-26 10:48:14,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 11 remaining) [2023-11-26 10:48:14,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-11-26 10:48:14,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-11-26 10:48:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:48:14,429 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:14,434 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 10:48:14,434 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:48:14,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:48:14 BasicIcfg [2023-11-26 10:48:14,440 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:48:14,441 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:48:14,441 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:48:14,442 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:48:14,442 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:54" (3/4) ... [2023-11-26 10:48:14,444 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 10:48:14,448 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-11-26 10:48:14,448 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-11-26 10:48:14,449 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-11-26 10:48:14,456 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 36 nodes and edges [2023-11-26 10:48:14,456 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-26 10:48:14,457 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-26 10:48:14,457 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-26 10:48:14,554 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:48:14,554 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 10:48:14,555 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:48:14,555 INFO L158 Benchmark]: Toolchain (without parser) took 21424.00ms. Allocated memory was 184.5MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 144.0MB in the beginning and 1.0GB in the end (delta: -890.2MB). Peak memory consumption was 621.7MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,556 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory was 91.4MB in the beginning and 91.4MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:48:14,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 719.99ms. Allocated memory is still 184.5MB. Free memory was 144.0MB in the beginning and 123.5MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,557 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.48ms. Allocated memory is still 184.5MB. Free memory was 123.5MB in the beginning and 121.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,557 INFO L158 Benchmark]: Boogie Preprocessor took 53.96ms. Allocated memory is still 184.5MB. Free memory was 121.4MB in the beginning and 119.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,558 INFO L158 Benchmark]: RCFGBuilder took 779.52ms. Allocated memory is still 184.5MB. Free memory was 118.8MB in the beginning and 142.7MB in the end (delta: -23.8MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,558 INFO L158 Benchmark]: TraceAbstraction took 19698.29ms. Allocated memory was 184.5MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 141.7MB in the beginning and 1.0GB in the end (delta: -897.8MB). Peak memory consumption was 612.1MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,558 INFO L158 Benchmark]: Witness Printer took 113.62ms. Allocated memory is still 1.7GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-26 10:48:14,561 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory was 91.4MB in the beginning and 91.4MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 719.99ms. Allocated memory is still 184.5MB. Free memory was 144.0MB in the beginning and 123.5MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.48ms. Allocated memory is still 184.5MB. Free memory was 123.5MB in the beginning and 121.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.96ms. Allocated memory is still 184.5MB. Free memory was 121.4MB in the beginning and 119.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 779.52ms. Allocated memory is still 184.5MB. Free memory was 118.8MB in the beginning and 142.7MB in the end (delta: -23.8MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. * TraceAbstraction took 19698.29ms. Allocated memory was 184.5MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 141.7MB in the beginning and 1.0GB in the end (delta: -897.8MB). Peak memory consumption was 612.1MB. Max. memory is 16.1GB. * Witness Printer took 113.62ms. Allocated memory is still 1.7GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 771]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 17]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 73 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.5s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1017 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 852 mSDsluCounter, 403 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 294 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2560 IncrementalHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 109 mSDtfsCounter, 2560 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1112occurred in iteration=13, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 325 ConstructedInterpolants, 0 QuantifiedInterpolants, 2415 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 10:48:14,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a4e098-398a-4b3f-801b-b58d78b8beef/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE