./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f044966ade6b1d79627a5dcb577ad24e14a4ae2ab2467e458af5fa83aa6cd521 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:58:53,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:58:53,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:58:53,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:58:53,906 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:58:53,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:58:53,929 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:58:53,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:58:53,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:58:53,931 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:58:53,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:58:53,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:58:53,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:58:53,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:58:53,934 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:58:53,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:58:53,935 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:58:53,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:58:53,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:58:53,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:58:53,937 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:58:53,940 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:58:53,940 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:58:53,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:58:53,941 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:58:53,941 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:58:53,942 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:58:53,942 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:58:53,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:58:53,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:58:53,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:58:53,944 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:58:53,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:58:53,944 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:58:53,944 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:58:53,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:58:53,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:58:53,945 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:58:53,945 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:58:53,945 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:58:53,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:58:53,946 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_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f044966ade6b1d79627a5dcb577ad24e14a4ae2ab2467e458af5fa83aa6cd521 [2023-11-29 01:58:54,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:58:54,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:58:54,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:58:54,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:58:54,198 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:58:54,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-29 01:58:56,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:58:57,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:58:57,142 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-29 01:58:57,148 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/data/0e8aa7196/6cb6f078bc1d474d98d8fbc21c1317a0/FLAGb1341033a [2023-11-29 01:58:57,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/data/0e8aa7196/6cb6f078bc1d474d98d8fbc21c1317a0 [2023-11-29 01:58:57,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:58:57,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:58:57,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:58:57,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:58:57,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:58:57,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75dbe5d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57, skipping insertion in model container [2023-11-29 01:58:57,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,193 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:58:57,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:58:57,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:58:57,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:58:57,387 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:58:57,387 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:58:57,393 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:58:57,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57 WrapperNode [2023-11-29 01:58:57,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:58:57,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:58:57,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:58:57,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:58:57,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,438 INFO L138 Inliner]: procedures = 24, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 253 [2023-11-29 01:58:57,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:58:57,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:58:57,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:58:57,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:58:57,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,476 INFO L175 MemorySlicer]: Split 12 memory accesses to 6 slices as follows [2, 2, 2, 2, 2, 2]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2023-11-29 01:58:57,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,487 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,489 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:58:57,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:58:57,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:58:57,500 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:58:57,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (1/1) ... [2023-11-29 01:58:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:58:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:57,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:58:57,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3916a0c2-2c30-4a2f-8325-86e5713dd73e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:58:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:58:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:58:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:58:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:58:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 01:58:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 01:58:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 01:58:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:58:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-29 01:58:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-29 01:58:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:58:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:58:57,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:58:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:58:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:58:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 01:58:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:58:57,567 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 01:58:57,680 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:58:57,682 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:58:58,004 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:58:58,265 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:58:58,265 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 01:58:58,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:58:58 BoogieIcfgContainer [2023-11-29 01:58:58,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:58:58,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:58:58,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:58:58,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:58:58,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:58:57" (1/3) ... [2023-11-29 01:58:58,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7898e9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:58:58, skipping insertion in model container [2023-11-29 01:58:58,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:58:57" (2/3) ... [2023-11-29 01:58:58,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7898e9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:58:58, skipping insertion in model container [2023-11-29 01:58:58,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:58:58" (3/3) ... [2023-11-29 01:58:58,273 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-5.wvr.c [2023-11-29 01:58:58,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:58:58,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-29 01:58:58,288 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:58:58,353 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-29 01:58:58,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 91 transitions, 217 flow [2023-11-29 01:58:58,427 INFO L124 PetriNetUnfolderBase]: 0/86 cut-off events. [2023-11-29 01:58:58,428 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 01:58:58,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 86 events. 0/86 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 166 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-29 01:58:58,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 91 transitions, 217 flow [2023-11-29 01:58:58,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 85 transitions, 200 flow [2023-11-29 01:58:58,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:58:58,452 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;@7d879a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:58:58,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-29 01:58:58,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:58:58,456 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 01:58:58,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:58:58,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 01:58:58,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:58:58,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:58,462 INFO L85 PathProgramCache]: Analyzing trace with hash 16969, now seen corresponding path program 1 times [2023-11-29 01:58:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:58,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225493459] [2023-11-29 01:58:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:58,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:58,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225493459] [2023-11-29 01:58:58,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225493459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:58,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:58,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:58:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520924122] [2023-11-29 01:58:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:58:58,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 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) [2023-11-29 01:58:58,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:58,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:58:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:04,232 INFO L124 PetriNetUnfolderBase]: 41408/60617 cut-off events. [2023-11-29 01:59:04,233 INFO L125 PetriNetUnfolderBase]: For 2723/2723 co-relation queries the response was YES. [2023-11-29 01:59:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116094 conditions, 60617 events. 41408/60617 cut-off events. For 2723/2723 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 442967 event pairs, 41408 based on Foata normal form. 1/58216 useless extension candidates. Maximal degree in co-relation 105924. Up to 53127 conditions per place. [2023-11-29 01:59:04,748 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-29 01:59:04,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 81 transitions, 270 flow [2023-11-29 01:59:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-29 01:59:04,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813186813186813 [2023-11-29 01:59:04,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-29 01:59:04,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-29 01:59:04,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:04,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-29 01:59:04,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:04,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:04,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:04,771 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 200 flow. Second operand 3 states and 186 transitions. [2023-11-29 01:59:04,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 81 transitions, 270 flow [2023-11-29 01:59:05,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 250 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-29 01:59:05,040 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 174 flow [2023-11-29 01:59:05,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2023-11-29 01:59:05,046 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2023-11-29 01:59:05,046 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 174 flow [2023-11-29 01:59:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 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) [2023-11-29 01:59:05,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:05,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 01:59:05,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:59:05,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:05,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash 16970, now seen corresponding path program 1 times [2023-11-29 01:59:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:05,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490396653] [2023-11-29 01:59:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:05,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490396653] [2023-11-29 01:59:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490396653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:05,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:05,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628852691] [2023-11-29 01:59:05,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:05,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:05,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:05,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-29 01:59:05,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:05,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:05,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-29 01:59:05,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:08,007 INFO L124 PetriNetUnfolderBase]: 28908/42402 cut-off events. [2023-11-29 01:59:08,007 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-29 01:59:08,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80688 conditions, 42402 events. 28908/42402 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 302027 event pairs, 28908 based on Foata normal form. 3126/44143 useless extension candidates. Maximal degree in co-relation 80682. Up to 37501 conditions per place. [2023-11-29 01:59:08,197 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-29 01:59:08,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 244 flow [2023-11-29 01:59:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-29 01:59:08,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-29 01:59:08,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-29 01:59:08,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-29 01:59:08,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:08,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-29 01:59:08,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:08,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:08,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:08,206 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 174 flow. Second operand 3 states and 189 transitions. [2023-11-29 01:59:08,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 244 flow [2023-11-29 01:59:08,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:08,210 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 171 flow [2023-11-29 01:59:08,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2023-11-29 01:59:08,211 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-11-29 01:59:08,211 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 171 flow [2023-11-29 01:59:08,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:08,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:08,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:59:08,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:59:08,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:08,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 506063832, now seen corresponding path program 1 times [2023-11-29 01:59:08,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:08,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392798730] [2023-11-29 01:59:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392798730] [2023-11-29 01:59:08,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392798730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:08,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:08,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:08,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258376117] [2023-11-29 01:59:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:08,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:08,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-29 01:59:08,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:08,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:08,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-29 01:59:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:10,991 INFO L124 PetriNetUnfolderBase]: 28908/42200 cut-off events. [2023-11-29 01:59:10,991 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-29 01:59:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80487 conditions, 42200 events. 28908/42200 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 297961 event pairs, 28908 based on Foata normal form. 480/41497 useless extension candidates. Maximal degree in co-relation 80480. Up to 37501 conditions per place. [2023-11-29 01:59:11,195 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-29 01:59:11,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 241 flow [2023-11-29 01:59:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-29 01:59:11,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-29 01:59:11,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-29 01:59:11,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-29 01:59:11,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:11,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-29 01:59:11,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,200 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 171 flow. Second operand 3 states and 189 transitions. [2023-11-29 01:59:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 241 flow [2023-11-29 01:59:11,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:11,202 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 168 flow [2023-11-29 01:59:11,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-11-29 01:59:11,204 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -14 predicate places. [2023-11-29 01:59:11,204 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 168 flow [2023-11-29 01:59:11,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:59:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:59:11,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:11,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 506063831, now seen corresponding path program 1 times [2023-11-29 01:59:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034524209] [2023-11-29 01:59:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:11,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034524209] [2023-11-29 01:59:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034524209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:11,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063970098] [2023-11-29 01:59:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:11,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:11,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:11,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:11,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:14,187 INFO L124 PetriNetUnfolderBase]: 30912/44946 cut-off events. [2023-11-29 01:59:14,187 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2023-11-29 01:59:14,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85868 conditions, 44946 events. 30912/44946 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 313781 event pairs, 30912 based on Foata normal form. 0/43648 useless extension candidates. Maximal degree in co-relation 85860. Up to 40135 conditions per place. [2023-11-29 01:59:14,379 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-29 01:59:14,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 242 flow [2023-11-29 01:59:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:14,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:14,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:14,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:14,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:14,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:14,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,384 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 168 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:14,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 242 flow [2023-11-29 01:59:14,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:14,386 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 165 flow [2023-11-29 01:59:14,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-11-29 01:59:14,388 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-11-29 01:59:14,388 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 165 flow [2023-11-29 01:59:14,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:14,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:59:14,389 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:14,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 812927118, now seen corresponding path program 1 times [2023-11-29 01:59:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558324427] [2023-11-29 01:59:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558324427] [2023-11-29 01:59:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558324427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:14,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:14,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680509054] [2023-11-29 01:59:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:14,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:14,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:14,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:14,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:17,366 INFO L124 PetriNetUnfolderBase]: 29248/42495 cut-off events. [2023-11-29 01:59:17,367 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2023-11-29 01:59:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81274 conditions, 42495 events. 29248/42495 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 296191 event pairs, 29248 based on Foata normal form. 0/41538 useless extension candidates. Maximal degree in co-relation 81265. Up to 37991 conditions per place. [2023-11-29 01:59:17,550 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-11-29 01:59:17,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 73 transitions, 239 flow [2023-11-29 01:59:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:17,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:17,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:17,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:17,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:17,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:17,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,553 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 165 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:17,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 73 transitions, 239 flow [2023-11-29 01:59:17,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 73 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:17,555 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 162 flow [2023-11-29 01:59:17,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-11-29 01:59:17,556 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-11-29 01:59:17,556 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 162 flow [2023-11-29 01:59:17,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:17,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:17,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:59:17,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:17,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash 812927119, now seen corresponding path program 1 times [2023-11-29 01:59:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:17,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097300167] [2023-11-29 01:59:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:17,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:17,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:17,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097300167] [2023-11-29 01:59:17,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097300167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:17,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:17,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:17,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469098379] [2023-11-29 01:59:17,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:17,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:17,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:17,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-29 01:59:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-29 01:59:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:20,396 INFO L124 PetriNetUnfolderBase]: 28908/41902 cut-off events. [2023-11-29 01:59:20,396 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-29 01:59:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80192 conditions, 41902 events. 28908/41902 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 292571 event pairs, 28908 based on Foata normal form. 120/41137 useless extension candidates. Maximal degree in co-relation 80182. Up to 37501 conditions per place. [2023-11-29 01:59:20,565 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-29 01:59:20,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 232 flow [2023-11-29 01:59:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-29 01:59:20,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-29 01:59:20,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-29 01:59:20,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-29 01:59:20,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:20,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-29 01:59:20,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,568 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 162 flow. Second operand 3 states and 189 transitions. [2023-11-29 01:59:20,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 232 flow [2023-11-29 01:59:20,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 71 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:20,569 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 159 flow [2023-11-29 01:59:20,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2023-11-29 01:59:20,570 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -17 predicate places. [2023-11-29 01:59:20,571 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 159 flow [2023-11-29 01:59:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:20,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:59:20,571 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:20,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1408266537, now seen corresponding path program 1 times [2023-11-29 01:59:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809139701] [2023-11-29 01:59:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:20,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809139701] [2023-11-29 01:59:20,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809139701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:20,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435318126] [2023-11-29 01:59:20,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:20,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:20,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:23,535 INFO L124 PetriNetUnfolderBase]: 29248/42371 cut-off events. [2023-11-29 01:59:23,536 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2023-11-29 01:59:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81152 conditions, 42371 events. 29248/42371 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 295587 event pairs, 29248 based on Foata normal form. 0/41570 useless extension candidates. Maximal degree in co-relation 81141. Up to 37991 conditions per place. [2023-11-29 01:59:23,744 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-29 01:59:23,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 69 transitions, 233 flow [2023-11-29 01:59:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:23,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:23,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:23,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:23,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:23,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:23,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:23,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:23,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:23,748 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 159 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:23,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 69 transitions, 233 flow [2023-11-29 01:59:23,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 69 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:23,749 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 156 flow [2023-11-29 01:59:23,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-11-29 01:59:23,750 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -18 predicate places. [2023-11-29 01:59:23,750 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 156 flow [2023-11-29 01:59:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:23,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:23,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:59:23,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:23,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1408266536, now seen corresponding path program 1 times [2023-11-29 01:59:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:23,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622921737] [2023-11-29 01:59:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:23,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:23,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622921737] [2023-11-29 01:59:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622921737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:23,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:23,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405708850] [2023-11-29 01:59:23,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:23,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:23,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:23,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:23,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:23,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:23,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:26,537 INFO L124 PetriNetUnfolderBase]: 29248/42331 cut-off events. [2023-11-29 01:59:26,538 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2023-11-29 01:59:26,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81113 conditions, 42331 events. 29248/42331 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 294864 event pairs, 29248 based on Foata normal form. 0/41530 useless extension candidates. Maximal degree in co-relation 81101. Up to 37991 conditions per place. [2023-11-29 01:59:26,749 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-29 01:59:26,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 230 flow [2023-11-29 01:59:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:26,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:26,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:26,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:26,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:26,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:26,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,754 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 156 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:26,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 230 flow [2023-11-29 01:59:26,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 67 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:26,756 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 153 flow [2023-11-29 01:59:26,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-11-29 01:59:26,756 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-11-29 01:59:26,757 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 153 flow [2023-11-29 01:59:26,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:26,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:59:26,757 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:26,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -427306712, now seen corresponding path program 1 times [2023-11-29 01:59:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817996534] [2023-11-29 01:59:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817996534] [2023-11-29 01:59:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817996534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:26,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:26,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916089606] [2023-11-29 01:59:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:26,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:26,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:26,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:26,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:29,676 INFO L124 PetriNetUnfolderBase]: 30912/44153 cut-off events. [2023-11-29 01:59:29,676 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-29 01:59:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85080 conditions, 44153 events. 30912/44153 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 302754 event pairs, 30912 based on Foata normal form. 0/43726 useless extension candidates. Maximal degree in co-relation 85067. Up to 40135 conditions per place. [2023-11-29 01:59:29,868 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-29 01:59:29,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 65 transitions, 227 flow [2023-11-29 01:59:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:29,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:29,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:29,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:29,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:29,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:29,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:29,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:29,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:29,872 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 153 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:29,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 65 transitions, 227 flow [2023-11-29 01:59:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 65 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:29,874 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 150 flow [2023-11-29 01:59:29,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-11-29 01:59:29,874 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-11-29 01:59:29,875 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 150 flow [2023-11-29 01:59:29,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:29,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:29,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:29,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:59:29,875 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:29,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -427306711, now seen corresponding path program 1 times [2023-11-29 01:59:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:29,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137171264] [2023-11-29 01:59:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:29,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:29,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137171264] [2023-11-29 01:59:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137171264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:29,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:29,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:29,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592679401] [2023-11-29 01:59:29,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:29,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:29,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:30,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-29 01:59:30,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:30,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:30,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-29 01:59:30,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:33,088 INFO L124 PetriNetUnfolderBase]: 30912/43951 cut-off events. [2023-11-29 01:59:33,088 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-29 01:59:33,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84879 conditions, 43951 events. 30912/43951 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 298897 event pairs, 30912 based on Foata normal form. 0/43524 useless extension candidates. Maximal degree in co-relation 84865. Up to 40135 conditions per place. [2023-11-29 01:59:33,280 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-11-29 01:59:33,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 63 transitions, 224 flow [2023-11-29 01:59:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-29 01:59:33,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-29 01:59:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-29 01:59:33,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-29 01:59:33,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:33,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-29 01:59:33,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:33,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:33,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:33,283 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 150 flow. Second operand 3 states and 185 transitions. [2023-11-29 01:59:33,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 63 transitions, 224 flow [2023-11-29 01:59:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 63 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:33,285 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 147 flow [2023-11-29 01:59:33,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-11-29 01:59:33,286 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -21 predicate places. [2023-11-29 01:59:33,286 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 147 flow [2023-11-29 01:59:33,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:33,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:33,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:33,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:59:33,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:33,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -127929636, now seen corresponding path program 1 times [2023-11-29 01:59:33,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:33,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433589237] [2023-11-29 01:59:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433589237] [2023-11-29 01:59:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433589237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:59:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244663877] [2023-11-29 01:59:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:34,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:59:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:59:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:59:34,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 91 [2023-11-29 01:59:34,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 91 [2023-11-29 01:59:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:44,335 INFO L124 PetriNetUnfolderBase]: 127801/168263 cut-off events. [2023-11-29 01:59:44,335 INFO L125 PetriNetUnfolderBase]: For 2840/2840 co-relation queries the response was YES. [2023-11-29 01:59:44,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335040 conditions, 168263 events. 127801/168263 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 4578. Compared 1069776 event pairs, 39794 based on Foata normal form. 1/168132 useless extension candidates. Maximal degree in co-relation 335025. Up to 86133 conditions per place. [2023-11-29 01:59:44,983 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 125 selfloop transitions, 15 changer transitions 12/172 dead transitions. [2023-11-29 01:59:44,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 172 transitions, 688 flow [2023-11-29 01:59:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:59:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:59:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2023-11-29 01:59:44,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2023-11-29 01:59:44,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2023-11-29 01:59:44,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2023-11-29 01:59:44,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:44,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2023-11-29 01:59:44,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,988 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 147 flow. Second operand 6 states and 429 transitions. [2023-11-29 01:59:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 172 transitions, 688 flow [2023-11-29 01:59:44,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 172 transitions, 687 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:44,992 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 247 flow [2023-11-29 01:59:44,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2023-11-29 01:59:44,993 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -14 predicate places. [2023-11-29 01:59:44,993 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 247 flow [2023-11-29 01:59:44,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:44,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:44,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:59:44,993 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:44,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1681112268, now seen corresponding path program 2 times [2023-11-29 01:59:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:44,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165494237] [2023-11-29 01:59:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:45,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165494237] [2023-11-29 01:59:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165494237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:45,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:59:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43730411] [2023-11-29 01:59:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:59:45,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:59:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:59:45,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 01:59:45,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:45,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:45,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 01:59:45,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:51,509 INFO L124 PetriNetUnfolderBase]: 57608/83363 cut-off events. [2023-11-29 01:59:51,509 INFO L125 PetriNetUnfolderBase]: For 2873/2999 co-relation queries the response was YES. [2023-11-29 01:59:51,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168812 conditions, 83363 events. 57608/83363 cut-off events. For 2873/2999 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 617370 event pairs, 8606 based on Foata normal form. 39/80437 useless extension candidates. Maximal degree in co-relation 168793. Up to 23687 conditions per place. [2023-11-29 01:59:52,074 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 120 selfloop transitions, 51 changer transitions 1/215 dead transitions. [2023-11-29 01:59:52,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 215 transitions, 888 flow [2023-11-29 01:59:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:59:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:59:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 589 transitions. [2023-11-29 01:59:52,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8090659340659341 [2023-11-29 01:59:52,077 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 589 transitions. [2023-11-29 01:59:52,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 589 transitions. [2023-11-29 01:59:52,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:52,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 589 transitions. [2023-11-29 01:59:52,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.625) internal successors, (589), 8 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:52,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:52,080 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:52,080 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 247 flow. Second operand 8 states and 589 transitions. [2023-11-29 01:59:52,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 215 transitions, 888 flow [2023-11-29 01:59:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 215 transitions, 879 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:52,146 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 445 flow [2023-11-29 01:59:52,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=445, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2023-11-29 01:59:52,147 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -7 predicate places. [2023-11-29 01:59:52,147 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 445 flow [2023-11-29 01:59:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:52,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:52,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:52,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 01:59:52,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 01:59:52,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash -551045634, now seen corresponding path program 3 times [2023-11-29 01:59:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:52,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452106732] [2023-11-29 01:59:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:52,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452106732] [2023-11-29 01:59:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452106732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:52,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:52,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:59:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340678223] [2023-11-29 01:59:52,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:52,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:59:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:59:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:59:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 01:59:52,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 445 flow. Second operand has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:52,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:52,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 01:59:52,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:05,138 INFO L124 PetriNetUnfolderBase]: 114513/166466 cut-off events. [2023-11-29 02:00:05,138 INFO L125 PetriNetUnfolderBase]: For 48045/49739 co-relation queries the response was YES. [2023-11-29 02:00:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394844 conditions, 166466 events. 114513/166466 cut-off events. For 48045/49739 co-relation queries the response was YES. Maximal size of possible extension queue 6303. Compared 1345146 event pairs, 25399 based on Foata normal form. 1740/165220 useless extension candidates. Maximal degree in co-relation 394823. Up to 60608 conditions per place. [2023-11-29 02:00:06,218 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 143 selfloop transitions, 74 changer transitions 0/260 dead transitions. [2023-11-29 02:00:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 260 transitions, 1335 flow [2023-11-29 02:00:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:00:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:00:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2023-11-29 02:00:06,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8351648351648352 [2023-11-29 02:00:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 380 transitions. [2023-11-29 02:00:06,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 380 transitions. [2023-11-29 02:00:06,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:06,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 380 transitions. [2023-11-29 02:00:06,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:06,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:06,223 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:06,223 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 445 flow. Second operand 5 states and 380 transitions. [2023-11-29 02:00:06,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 260 transitions, 1335 flow [2023-11-29 02:00:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 260 transitions, 1329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:07,148 INFO L231 Difference]: Finished difference. Result has 99 places, 186 transitions, 994 flow [2023-11-29 02:00:07,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=994, PETRI_PLACES=99, PETRI_TRANSITIONS=186} [2023-11-29 02:00:07,149 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -2 predicate places. [2023-11-29 02:00:07,149 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 186 transitions, 994 flow [2023-11-29 02:00:07,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:07,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:07,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:07,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:00:07,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 02:00:07,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash -966677790, now seen corresponding path program 4 times [2023-11-29 02:00:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:07,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48982574] [2023-11-29 02:00:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48982574] [2023-11-29 02:00:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48982574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:07,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:00:07,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492919771] [2023-11-29 02:00:07,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:07,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:00:07,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 02:00:07,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 186 transitions, 994 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:07,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:07,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 02:00:07,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:27,619 INFO L124 PetriNetUnfolderBase]: 161184/234756 cut-off events. [2023-11-29 02:00:27,619 INFO L125 PetriNetUnfolderBase]: For 230008/234253 co-relation queries the response was YES. [2023-11-29 02:00:28,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665979 conditions, 234756 events. 161184/234756 cut-off events. For 230008/234253 co-relation queries the response was YES. Maximal size of possible extension queue 9482. Compared 1991911 event pairs, 29889 based on Foata normal form. 3192/231507 useless extension candidates. Maximal degree in co-relation 665955. Up to 73045 conditions per place. [2023-11-29 02:00:29,490 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 151 selfloop transitions, 154 changer transitions 0/348 dead transitions. [2023-11-29 02:00:29,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 348 transitions, 2325 flow [2023-11-29 02:00:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:00:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:00:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2023-11-29 02:00:29,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8553113553113553 [2023-11-29 02:00:29,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 467 transitions. [2023-11-29 02:00:29,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 467 transitions. [2023-11-29 02:00:29,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:29,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 467 transitions. [2023-11-29 02:00:29,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,497 INFO L175 Difference]: Start difference. First operand has 99 places, 186 transitions, 994 flow. Second operand 6 states and 467 transitions. [2023-11-29 02:00:29,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 348 transitions, 2325 flow [2023-11-29 02:00:31,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 348 transitions, 2306 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:31,354 INFO L231 Difference]: Finished difference. Result has 105 places, 261 transitions, 1907 flow [2023-11-29 02:00:31,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1907, PETRI_PLACES=105, PETRI_TRANSITIONS=261} [2023-11-29 02:00:31,355 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, 4 predicate places. [2023-11-29 02:00:31,355 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 261 transitions, 1907 flow [2023-11-29 02:00:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:31,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:00:31,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 02:00:31,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365010, now seen corresponding path program 5 times [2023-11-29 02:00:31,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:31,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211562877] [2023-11-29 02:00:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:31,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211562877] [2023-11-29 02:00:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211562877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:31,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:00:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836358327] [2023-11-29 02:00:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:00:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:00:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:00:31,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 02:00:31,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 261 transitions, 1907 flow. Second operand has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:31,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 02:00:31,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:53,693 INFO L124 PetriNetUnfolderBase]: 156892/229960 cut-off events. [2023-11-29 02:00:53,693 INFO L125 PetriNetUnfolderBase]: For 450113/456422 co-relation queries the response was YES. [2023-11-29 02:00:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737902 conditions, 229960 events. 156892/229960 cut-off events. For 450113/456422 co-relation queries the response was YES. Maximal size of possible extension queue 9172. Compared 1958505 event pairs, 36006 based on Foata normal form. 4355/230287 useless extension candidates. Maximal degree in co-relation 737875. Up to 109036 conditions per place. [2023-11-29 02:00:55,459 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 204 selfloop transitions, 118 changer transitions 0/365 dead transitions. [2023-11-29 02:00:55,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 365 transitions, 3112 flow [2023-11-29 02:00:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:00:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:00:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-11-29 02:00:55,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8395604395604396 [2023-11-29 02:00:55,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-11-29 02:00:55,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-11-29 02:00:55,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:55,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-11-29 02:00:55,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:55,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:55,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:55,463 INFO L175 Difference]: Start difference. First operand has 105 places, 261 transitions, 1907 flow. Second operand 5 states and 382 transitions. [2023-11-29 02:00:55,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 365 transitions, 3112 flow [2023-11-29 02:00:57,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 365 transitions, 3092 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-29 02:00:57,872 INFO L231 Difference]: Finished difference. Result has 111 places, 291 transitions, 2524 flow [2023-11-29 02:00:57,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2524, PETRI_PLACES=111, PETRI_TRANSITIONS=291} [2023-11-29 02:00:57,872 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, 10 predicate places. [2023-11-29 02:00:57,873 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 291 transitions, 2524 flow [2023-11-29 02:00:57,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:57,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:57,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:57,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 02:00:57,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-29 02:00:57,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1517407090, now seen corresponding path program 6 times [2023-11-29 02:00:57,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:57,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884614171] [2023-11-29 02:00:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:57,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:58,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:58,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884614171] [2023-11-29 02:00:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884614171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:58,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:58,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:00:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657732394] [2023-11-29 02:00:58,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:00:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:00:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:00:58,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 91 [2023-11-29 02:00:58,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 291 transitions, 2524 flow. Second operand has 7 states, 7 states have (on average 57.285714285714285) internal successors, (401), 7 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:58,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:58,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 91 [2023-11-29 02:00:58,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand