./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:07,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:07,259 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:46:07,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:07,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:07,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:07,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:07,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:07,320 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:07,325 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:07,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:07,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:07,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:07,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:07,330 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:07,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:07,331 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:07,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:07,332 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:07,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:07,333 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:46:07,333 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:46:07,334 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:46:07,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:07,335 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:46:07,335 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:46:07,336 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:07,336 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:07,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:07,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:07,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:07,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:07,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:07,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:07,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:07,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:07,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:07,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:07,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:07,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:07,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:07,342 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_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 [2023-11-26 10:46:07,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:07,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:07,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:07,646 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:07,647 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:07,648 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-26 10:46:10,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:11,034 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:11,035 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-26 10:46:11,047 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/data/be4f1a286/a9ec7bf4b3604a0cb563eb4e81bfa965/FLAG04ae6fb5f [2023-11-26 10:46:11,070 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/data/be4f1a286/a9ec7bf4b3604a0cb563eb4e81bfa965 [2023-11-26 10:46:11,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:11,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:11,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:11,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:11,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:11,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b56259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11, skipping insertion in model container [2023-11-26 10:46:11,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:11,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:11,321 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:11,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:11,348 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:46:11,349 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:46:11,357 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:11,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11 WrapperNode [2023-11-26 10:46:11,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:11,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:11,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:11,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:11,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,398 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-26 10:46:11,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:11,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:11,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:11,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:11,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,415 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,435 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:46:11,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:11,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:11,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:11,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:11,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (1/1) ... [2023-11-26 10:46:11,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:11,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:11,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:46:11,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:46:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:46:11,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:46:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:46:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:46:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:46:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:11,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:46:11,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:46:11,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:46:11,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:46:11,563 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:46:11,673 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:11,675 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:11,892 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:12,057 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:12,058 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:46:12,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:12 BoogieIcfgContainer [2023-11-26 10:46:12,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:12,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:12,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:12,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:12,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:11" (1/3) ... [2023-11-26 10:46:12,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2289bb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:12, skipping insertion in model container [2023-11-26 10:46:12,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:11" (2/3) ... [2023-11-26 10:46:12,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2289bb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:12, skipping insertion in model container [2023-11-26 10:46:12,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:12" (3/3) ... [2023-11-26 10:46:12,073 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-11-26 10:46:12,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:12,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 10:46:12,095 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:46:12,171 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:46:12,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 10:46:12,276 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-11-26 10:46:12,283 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:46:12,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-26 10:46:12,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 10:46:12,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2023-11-26 10:46:12,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:12,337 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;@46506853, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:12,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-26 10:46:12,341 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:46:12,341 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 10:46:12,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:46:12,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:12,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:46:12,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:12,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 7908, now seen corresponding path program 1 times [2023-11-26 10:46:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:12,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999220305] [2023-11-26 10:46:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:12,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:12,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999220305] [2023-11-26 10:46:12,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999220305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:12,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:12,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:12,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282248777] [2023-11-26 10:46:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:12,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:12,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2023-11-26 10:46:12,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:12,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:12,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2023-11-26 10:46:12,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:12,988 INFO L124 PetriNetUnfolderBase]: 93/200 cut-off events. [2023-11-26 10:46:12,988 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-26 10:46:12,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 200 events. 93/200 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 643 event pairs, 66 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 321. Up to 157 conditions per place. [2023-11-26 10:46:12,993 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 17 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-26 10:46:12,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 108 flow [2023-11-26 10:46:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-26 10:46:13,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2023-11-26 10:46:13,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-26 10:46:13,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-26 10:46:13,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:13,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-26 10:46:13,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,018 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 66 transitions. [2023-11-26 10:46:13,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 108 flow [2023-11-26 10:46:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:46:13,024 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 66 flow [2023-11-26 10:46:13,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-26 10:46:13,030 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2023-11-26 10:46:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 66 flow [2023-11-26 10:46:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:13,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:46:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:46:13,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:13,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash 7909, now seen corresponding path program 1 times [2023-11-26 10:46:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261757407] [2023-11-26 10:46:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:13,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261757407] [2023-11-26 10:46:13,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261757407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:13,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:13,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:13,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255112843] [2023-11-26 10:46:13,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:13,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:13,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:13,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:13,281 INFO L124 PetriNetUnfolderBase]: 61/136 cut-off events. [2023-11-26 10:46:13,282 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 10:46:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 136 events. 61/136 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 396 event pairs, 42 based on Foata normal form. 17/126 useless extension candidates. Maximal degree in co-relation 247. Up to 108 conditions per place. [2023-11-26 10:46:13,284 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 15 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-26 10:46:13,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 94 flow [2023-11-26 10:46:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 10:46:13,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2023-11-26 10:46:13,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:13,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,298 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 66 flow. Second operand 3 states and 69 transitions. [2023-11-26 10:46:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 94 flow [2023-11-26 10:46:13,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:13,300 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 63 flow [2023-11-26 10:46:13,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-26 10:46:13,305 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-26 10:46:13,306 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 63 flow [2023-11-26 10:46:13,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:13,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:46:13,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:46:13,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:13,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 235795154, now seen corresponding path program 1 times [2023-11-26 10:46:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047597605] [2023-11-26 10:46:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:13,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:13,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047597605] [2023-11-26 10:46:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047597605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319079554] [2023-11-26 10:46:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2023-11-26 10:46:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:13,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2023-11-26 10:46:13,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:13,437 INFO L124 PetriNetUnfolderBase]: 69/146 cut-off events. [2023-11-26 10:46:13,438 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 10:46:13,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 146 events. 69/146 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 411 event pairs, 48 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 273. Up to 124 conditions per place. [2023-11-26 10:46:13,440 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 17 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-26 10:46:13,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 95 flow [2023-11-26 10:46:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-26 10:46:13,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2023-11-26 10:46:13,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-26 10:46:13,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-26 10:46:13,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:13,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-26 10:46:13,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,445 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 63 flow. Second operand 3 states and 65 transitions. [2023-11-26 10:46:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 95 flow [2023-11-26 10:46:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:13,447 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 60 flow [2023-11-26 10:46:13,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-26 10:46:13,448 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-26 10:46:13,449 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 60 flow [2023-11-26 10:46:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:13,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:46:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:46:13,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:13,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 235795155, now seen corresponding path program 1 times [2023-11-26 10:46:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116318501] [2023-11-26 10:46:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:13,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116318501] [2023-11-26 10:46:13,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116318501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:13,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:13,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534170252] [2023-11-26 10:46:13,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:13,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:13,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:13,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:13,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:13,671 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-11-26 10:46:13,672 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 10:46:13,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 130 events. 61/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 360 event pairs, 42 based on Foata normal form. 7/116 useless extension candidates. Maximal degree in co-relation 241. Up to 108 conditions per place. [2023-11-26 10:46:13,675 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 15 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-26 10:46:13,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 88 flow [2023-11-26 10:46:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 10:46:13,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2023-11-26 10:46:13,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:13,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 10:46:13,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2023-11-26 10:46:13,685 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 60 flow. Second operand 3 states and 69 transitions. [2023-11-26 10:46:13,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 88 flow [2023-11-26 10:46:13,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:13,687 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 57 flow [2023-11-26 10:46:13,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-26 10:46:13,689 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-26 10:46:13,689 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 57 flow [2023-11-26 10:46:13,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:13,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:13,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:46:13,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:13,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1690303433, now seen corresponding path program 1 times [2023-11-26 10:46:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282456081] [2023-11-26 10:46:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282456081] [2023-11-26 10:46:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282456081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:14,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717458250] [2023-11-26 10:46:14,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:14,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 57 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:14,388 INFO L124 PetriNetUnfolderBase]: 111/210 cut-off events. [2023-11-26 10:46:14,388 INFO L125 PetriNetUnfolderBase]: For 7/9 co-relation queries the response was YES. [2023-11-26 10:46:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 210 events. 111/210 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 678 event pairs, 2 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 414. Up to 57 conditions per place. [2023-11-26 10:46:14,394 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 40 selfloop transitions, 10 changer transitions 10/66 dead transitions. [2023-11-26 10:46:14,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 66 transitions, 269 flow [2023-11-26 10:46:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2023-11-26 10:46:14,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6426426426426426 [2023-11-26 10:46:14,397 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 214 transitions. [2023-11-26 10:46:14,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 214 transitions. [2023-11-26 10:46:14,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:14,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 214 transitions. [2023-11-26 10:46:14,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.77777777777778) internal successors, (214), 9 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,403 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 57 flow. Second operand 9 states and 214 transitions. [2023-11-26 10:46:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 66 transitions, 269 flow [2023-11-26 10:46:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 66 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:14,408 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 121 flow [2023-11-26 10:46:14,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-11-26 10:46:14,411 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-11-26 10:46:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 121 flow [2023-11-26 10:46:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:14,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:46:14,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:14,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1620742703, now seen corresponding path program 2 times [2023-11-26 10:46:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:14,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768329136] [2023-11-26 10:46:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:14,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:14,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768329136] [2023-11-26 10:46:14,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768329136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:14,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648589068] [2023-11-26 10:46:14,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:14,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:14,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:14,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:14,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:14,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:15,045 INFO L124 PetriNetUnfolderBase]: 114/224 cut-off events. [2023-11-26 10:46:15,045 INFO L125 PetriNetUnfolderBase]: For 96/100 co-relation queries the response was YES. [2023-11-26 10:46:15,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 224 events. 114/224 cut-off events. For 96/100 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 717 event pairs, 15 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 595. Up to 115 conditions per place. [2023-11-26 10:46:15,068 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 34 selfloop transitions, 14 changer transitions 10/64 dead transitions. [2023-11-26 10:46:15,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 350 flow [2023-11-26 10:46:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2023-11-26 10:46:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276276276276276 [2023-11-26 10:46:15,071 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 209 transitions. [2023-11-26 10:46:15,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 209 transitions. [2023-11-26 10:46:15,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:15,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 209 transitions. [2023-11-26 10:46:15,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,073 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,074 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 121 flow. Second operand 9 states and 209 transitions. [2023-11-26 10:46:15,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 350 flow [2023-11-26 10:46:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 338 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 10:46:15,080 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 204 flow [2023-11-26 10:46:15,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=204, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-11-26 10:46:15,083 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2023-11-26 10:46:15,083 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 204 flow [2023-11-26 10:46:15,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:15,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:15,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:46:15,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:15,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1121008787, now seen corresponding path program 3 times [2023-11-26 10:46:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:15,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743425623] [2023-11-26 10:46:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743425623] [2023-11-26 10:46:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743425623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:15,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:15,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903037193] [2023-11-26 10:46:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:15,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:15,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:15,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 204 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:15,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:15,687 INFO L124 PetriNetUnfolderBase]: 120/231 cut-off events. [2023-11-26 10:46:15,688 INFO L125 PetriNetUnfolderBase]: For 209/213 co-relation queries the response was YES. [2023-11-26 10:46:15,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 231 events. 120/231 cut-off events. For 209/213 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 760 event pairs, 11 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 715. Up to 119 conditions per place. [2023-11-26 10:46:15,692 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 39 selfloop transitions, 18 changer transitions 10/73 dead transitions. [2023-11-26 10:46:15,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 471 flow [2023-11-26 10:46:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2023-11-26 10:46:15,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-26 10:46:15,695 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 213 transitions. [2023-11-26 10:46:15,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 213 transitions. [2023-11-26 10:46:15,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:15,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 213 transitions. [2023-11-26 10:46:15,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,701 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,701 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 204 flow. Second operand 9 states and 213 transitions. [2023-11-26 10:46:15,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 471 flow [2023-11-26 10:46:15,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 436 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-26 10:46:15,711 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 270 flow [2023-11-26 10:46:15,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=270, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-11-26 10:46:15,714 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-26 10:46:15,714 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 270 flow [2023-11-26 10:46:15,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:15,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:46:15,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 155261197, now seen corresponding path program 4 times [2023-11-26 10:46:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:15,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849758990] [2023-11-26 10:46:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:15,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849758990] [2023-11-26 10:46:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849758990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:15,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556802217] [2023-11-26 10:46:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:15,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:15,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:15,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:15,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:16,306 INFO L124 PetriNetUnfolderBase]: 141/264 cut-off events. [2023-11-26 10:46:16,306 INFO L125 PetriNetUnfolderBase]: For 415/419 co-relation queries the response was YES. [2023-11-26 10:46:16,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 264 events. 141/264 cut-off events. For 415/419 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 862 event pairs, 20 based on Foata normal form. 2/265 useless extension candidates. Maximal degree in co-relation 910. Up to 129 conditions per place. [2023-11-26 10:46:16,311 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 36 selfloop transitions, 26 changer transitions 10/78 dead transitions. [2023-11-26 10:46:16,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 590 flow [2023-11-26 10:46:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:16,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:16,314 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:16,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:16,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:16,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:16,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,319 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,320 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 270 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 590 flow [2023-11-26 10:46:16,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 528 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:16,328 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 405 flow [2023-11-26 10:46:16,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=405, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-26 10:46:16,331 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-11-26 10:46:16,332 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 405 flow [2023-11-26 10:46:16,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:16,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:46:16,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:16,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash 492937801, now seen corresponding path program 5 times [2023-11-26 10:46:16,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:16,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366622531] [2023-11-26 10:46:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366622531] [2023-11-26 10:46:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366622531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:16,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:16,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96981083] [2023-11-26 10:46:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:16,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:16,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:16,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 405 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:16,876 INFO L124 PetriNetUnfolderBase]: 149/280 cut-off events. [2023-11-26 10:46:16,876 INFO L125 PetriNetUnfolderBase]: For 642/642 co-relation queries the response was YES. [2023-11-26 10:46:16,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 280 events. 149/280 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 960 event pairs, 12 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 1053. Up to 132 conditions per place. [2023-11-26 10:46:16,881 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 48 selfloop transitions, 25 changer transitions 10/89 dead transitions. [2023-11-26 10:46:16,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 729 flow [2023-11-26 10:46:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2023-11-26 10:46:16,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-26 10:46:16,884 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 216 transitions. [2023-11-26 10:46:16,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 216 transitions. [2023-11-26 10:46:16,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:16,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 216 transitions. [2023-11-26 10:46:16,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,887 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,887 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 405 flow. Second operand 9 states and 216 transitions. [2023-11-26 10:46:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 729 flow [2023-11-26 10:46:16,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 682 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-26 10:46:16,894 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 437 flow [2023-11-26 10:46:16,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=437, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-26 10:46:16,895 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-26 10:46:16,896 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 437 flow [2023-11-26 10:46:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:16,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:46:16,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:16,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 858637347, now seen corresponding path program 6 times [2023-11-26 10:46:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312776176] [2023-11-26 10:46:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312776176] [2023-11-26 10:46:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312776176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584511315] [2023-11-26 10:46:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:17,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:17,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 437 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:17,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:17,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:17,437 INFO L124 PetriNetUnfolderBase]: 166/309 cut-off events. [2023-11-26 10:46:17,437 INFO L125 PetriNetUnfolderBase]: For 848/848 co-relation queries the response was YES. [2023-11-26 10:46:17,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 309 events. 166/309 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1063 event pairs, 12 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 1261. Up to 149 conditions per place. [2023-11-26 10:46:17,442 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 43 selfloop transitions, 33 changer transitions 9/91 dead transitions. [2023-11-26 10:46:17,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 828 flow [2023-11-26 10:46:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:17,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:17,444 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:17,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:17,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:17,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:17,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,448 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,448 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 437 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:17,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 828 flow [2023-11-26 10:46:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 752 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:17,458 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 602 flow [2023-11-26 10:46:17,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=602, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2023-11-26 10:46:17,461 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-11-26 10:46:17,461 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 602 flow [2023-11-26 10:46:17,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:17,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:46:17,462 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:17,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1342711373, now seen corresponding path program 7 times [2023-11-26 10:46:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320229515] [2023-11-26 10:46:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:17,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320229515] [2023-11-26 10:46:17,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320229515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:17,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:17,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502977758] [2023-11-26 10:46:17,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:17,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:17,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:17,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:17,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:17,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:17,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:17,992 INFO L124 PetriNetUnfolderBase]: 164/308 cut-off events. [2023-11-26 10:46:17,992 INFO L125 PetriNetUnfolderBase]: For 1113/1113 co-relation queries the response was YES. [2023-11-26 10:46:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 308 events. 164/308 cut-off events. For 1113/1113 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1085 event pairs, 14 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 1343. Up to 147 conditions per place. [2023-11-26 10:46:17,997 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 51 selfloop transitions, 29 changer transitions 11/97 dead transitions. [2023-11-26 10:46:17,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 953 flow [2023-11-26 10:46:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2023-11-26 10:46:17,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336336336336337 [2023-11-26 10:46:17,999 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 211 transitions. [2023-11-26 10:46:17,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 211 transitions. [2023-11-26 10:46:18,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:18,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 211 transitions. [2023-11-26 10:46:18,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,003 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,003 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 602 flow. Second operand 9 states and 211 transitions. [2023-11-26 10:46:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 953 flow [2023-11-26 10:46:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 871 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-11-26 10:46:18,013 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 583 flow [2023-11-26 10:46:18,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-11-26 10:46:18,013 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2023-11-26 10:46:18,013 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 583 flow [2023-11-26 10:46:18,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:18,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:46:18,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1577097641, now seen corresponding path program 8 times [2023-11-26 10:46:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:18,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160551205] [2023-11-26 10:46:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160551205] [2023-11-26 10:46:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160551205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:18,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274858323] [2023-11-26 10:46:18,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:18,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:18,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:18,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:18,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 583 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:18,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:18,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:18,511 INFO L124 PetriNetUnfolderBase]: 161/298 cut-off events. [2023-11-26 10:46:18,511 INFO L125 PetriNetUnfolderBase]: For 938/940 co-relation queries the response was YES. [2023-11-26 10:46:18,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1308 conditions, 298 events. 161/298 cut-off events. For 938/940 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1022 event pairs, 13 based on Foata normal form. 1/299 useless extension candidates. Maximal degree in co-relation 1283. Up to 145 conditions per place. [2023-11-26 10:46:18,515 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 43 selfloop transitions, 32 changer transitions 9/90 dead transitions. [2023-11-26 10:46:18,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 870 flow [2023-11-26 10:46:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:18,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:18,520 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:18,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:18,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:18,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:18,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,523 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,523 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 583 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 870 flow [2023-11-26 10:46:18,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 804 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:18,533 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 629 flow [2023-11-26 10:46:18,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=629, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-26 10:46:18,536 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 38 predicate places. [2023-11-26 10:46:18,536 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 629 flow [2023-11-26 10:46:18,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:18,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:18,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:46:18,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:18,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1602733633, now seen corresponding path program 9 times [2023-11-26 10:46:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:18,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172237008] [2023-11-26 10:46:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:18,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:18,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172237008] [2023-11-26 10:46:18,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172237008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:18,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:18,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:18,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064937348] [2023-11-26 10:46:18,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:18,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:18,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:18,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:18,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:18,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:18,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:18,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:19,008 INFO L124 PetriNetUnfolderBase]: 160/300 cut-off events. [2023-11-26 10:46:19,009 INFO L125 PetriNetUnfolderBase]: For 996/998 co-relation queries the response was YES. [2023-11-26 10:46:19,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 300 events. 160/300 cut-off events. For 996/998 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1057 event pairs, 15 based on Foata normal form. 2/302 useless extension candidates. Maximal degree in co-relation 1299. Up to 143 conditions per place. [2023-11-26 10:46:19,013 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 42 selfloop transitions, 30 changer transitions 12/90 dead transitions. [2023-11-26 10:46:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 883 flow [2023-11-26 10:46:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:19,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:19,015 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:19,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,018 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,018 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 629 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:19,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 883 flow [2023-11-26 10:46:19,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 90 transitions, 821 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-26 10:46:19,028 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 604 flow [2023-11-26 10:46:19,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=604, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2023-11-26 10:46:19,029 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2023-11-26 10:46:19,029 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 604 flow [2023-11-26 10:46:19,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:19,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:46:19,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 807893495, now seen corresponding path program 10 times [2023-11-26 10:46:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495218042] [2023-11-26 10:46:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495218042] [2023-11-26 10:46:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495218042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:19,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:19,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:19,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037856669] [2023-11-26 10:46:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:19,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:19,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:19,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:19,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:19,487 INFO L124 PetriNetUnfolderBase]: 164/303 cut-off events. [2023-11-26 10:46:19,488 INFO L125 PetriNetUnfolderBase]: For 1089/1091 co-relation queries the response was YES. [2023-11-26 10:46:19,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1333 conditions, 303 events. 164/303 cut-off events. For 1089/1091 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1039 event pairs, 18 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1306. Up to 145 conditions per place. [2023-11-26 10:46:19,491 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 44 selfloop transitions, 31 changer transitions 9/90 dead transitions. [2023-11-26 10:46:19,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 874 flow [2023-11-26 10:46:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:19,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:19,493 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:19,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:19,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,496 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,496 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 604 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:19,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 874 flow [2023-11-26 10:46:19,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 810 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:19,504 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 624 flow [2023-11-26 10:46:19,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-11-26 10:46:19,505 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2023-11-26 10:46:19,505 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 624 flow [2023-11-26 10:46:19,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:19,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:19,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:46:19,506 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:19,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2099489217, now seen corresponding path program 11 times [2023-11-26 10:46:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:19,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770973814] [2023-11-26 10:46:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:19,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:19,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:19,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770973814] [2023-11-26 10:46:19,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770973814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:19,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:19,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:19,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229846666] [2023-11-26 10:46:19,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:19,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:19,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:19,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:19,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:19,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:19,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:19,968 INFO L124 PetriNetUnfolderBase]: 176/332 cut-off events. [2023-11-26 10:46:19,968 INFO L125 PetriNetUnfolderBase]: For 1307/1307 co-relation queries the response was YES. [2023-11-26 10:46:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 332 events. 176/332 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1236 event pairs, 14 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1408. Up to 157 conditions per place. [2023-11-26 10:46:19,972 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 47 selfloop transitions, 31 changer transitions 10/94 dead transitions. [2023-11-26 10:46:19,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 94 transitions, 914 flow [2023-11-26 10:46:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2023-11-26 10:46:19,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-26 10:46:19,975 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 216 transitions. [2023-11-26 10:46:19,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 216 transitions. [2023-11-26 10:46:19,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:19,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 216 transitions. [2023-11-26 10:46:19,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,980 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,980 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 624 flow. Second operand 9 states and 216 transitions. [2023-11-26 10:46:19,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 94 transitions, 914 flow [2023-11-26 10:46:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 94 transitions, 838 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:19,993 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 637 flow [2023-11-26 10:46:19,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=637, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2023-11-26 10:46:19,995 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 43 predicate places. [2023-11-26 10:46:19,995 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 637 flow [2023-11-26 10:46:19,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:19,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:19,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:46:19,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:19,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1625867983, now seen corresponding path program 12 times [2023-11-26 10:46:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742586226] [2023-11-26 10:46:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:20,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742586226] [2023-11-26 10:46:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742586226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:20,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743083793] [2023-11-26 10:46:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:20,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:20,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 637 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:20,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:20,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:20,490 INFO L124 PetriNetUnfolderBase]: 166/317 cut-off events. [2023-11-26 10:46:20,491 INFO L125 PetriNetUnfolderBase]: For 1375/1377 co-relation queries the response was YES. [2023-11-26 10:46:20,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 317 events. 166/317 cut-off events. For 1375/1377 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1153 event pairs, 18 based on Foata normal form. 2/319 useless extension candidates. Maximal degree in co-relation 1377. Up to 159 conditions per place. [2023-11-26 10:46:20,495 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 44 selfloop transitions, 28 changer transitions 12/90 dead transitions. [2023-11-26 10:46:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 894 flow [2023-11-26 10:46:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2023-11-26 10:46:20,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366366366366366 [2023-11-26 10:46:20,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 212 transitions. [2023-11-26 10:46:20,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 212 transitions. [2023-11-26 10:46:20,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:20,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 212 transitions. [2023-11-26 10:46:20,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,504 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 637 flow. Second operand 9 states and 212 transitions. [2023-11-26 10:46:20,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 894 flow [2023-11-26 10:46:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 824 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:20,515 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 592 flow [2023-11-26 10:46:20,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=592, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-11-26 10:46:20,516 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 43 predicate places. [2023-11-26 10:46:20,517 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 592 flow [2023-11-26 10:46:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:20,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:46:20,518 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:20,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash -407800171, now seen corresponding path program 13 times [2023-11-26 10:46:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:20,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935978071] [2023-11-26 10:46:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:20,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:20,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935978071] [2023-11-26 10:46:20,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935978071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:20,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:20,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086542154] [2023-11-26 10:46:20,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:20,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:20,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:20,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:20,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 592 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:20,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:20,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:20,989 INFO L124 PetriNetUnfolderBase]: 162/313 cut-off events. [2023-11-26 10:46:20,989 INFO L125 PetriNetUnfolderBase]: For 1214/1214 co-relation queries the response was YES. [2023-11-26 10:46:20,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1334 conditions, 313 events. 162/313 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1104 event pairs, 19 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1306. Up to 157 conditions per place. [2023-11-26 10:46:20,993 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 43 selfloop transitions, 30 changer transitions 9/88 dead transitions. [2023-11-26 10:46:20,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 877 flow [2023-11-26 10:46:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2023-11-26 10:46:20,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2023-11-26 10:46:20,996 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 210 transitions. [2023-11-26 10:46:20,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 210 transitions. [2023-11-26 10:46:20,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:20,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 210 transitions. [2023-11-26 10:46:20,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,999 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:20,999 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 592 flow. Second operand 9 states and 210 transitions. [2023-11-26 10:46:20,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 877 flow [2023-11-26 10:46:21,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 88 transitions, 813 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:21,008 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 635 flow [2023-11-26 10:46:21,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=635, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-11-26 10:46:21,009 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2023-11-26 10:46:21,010 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 635 flow [2023-11-26 10:46:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:21,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:46:21,011 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:21,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1607019907, now seen corresponding path program 14 times [2023-11-26 10:46:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:21,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788020855] [2023-11-26 10:46:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788020855] [2023-11-26 10:46:21,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788020855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:21,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:21,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682771263] [2023-11-26 10:46:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:21,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:21,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 635 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:21,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:21,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:21,453 INFO L124 PetriNetUnfolderBase]: 172/331 cut-off events. [2023-11-26 10:46:21,454 INFO L125 PetriNetUnfolderBase]: For 1372/1372 co-relation queries the response was YES. [2023-11-26 10:46:21,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 331 events. 172/331 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1201 event pairs, 19 based on Foata normal form. 1/331 useless extension candidates. Maximal degree in co-relation 1408. Up to 161 conditions per place. [2023-11-26 10:46:21,458 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 51 selfloop transitions, 27 changer transitions 9/93 dead transitions. [2023-11-26 10:46:21,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 962 flow [2023-11-26 10:46:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2023-11-26 10:46:21,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2023-11-26 10:46:21,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 210 transitions. [2023-11-26 10:46:21,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 210 transitions. [2023-11-26 10:46:21,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:21,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 210 transitions. [2023-11-26 10:46:21,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,463 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 635 flow. Second operand 9 states and 210 transitions. [2023-11-26 10:46:21,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 962 flow [2023-11-26 10:46:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 93 transitions, 907 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-26 10:46:21,475 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 670 flow [2023-11-26 10:46:21,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2023-11-26 10:46:21,475 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2023-11-26 10:46:21,475 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 670 flow [2023-11-26 10:46:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:21,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:46:21,476 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash -214607181, now seen corresponding path program 15 times [2023-11-26 10:46:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011798799] [2023-11-26 10:46:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:21,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011798799] [2023-11-26 10:46:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011798799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:21,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:21,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:21,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749339734] [2023-11-26 10:46:21,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:21,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:21,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:21,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:21,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:21,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:21,919 INFO L124 PetriNetUnfolderBase]: 164/319 cut-off events. [2023-11-26 10:46:21,919 INFO L125 PetriNetUnfolderBase]: For 1446/1446 co-relation queries the response was YES. [2023-11-26 10:46:21,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 319 events. 164/319 cut-off events. For 1446/1446 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1140 event pairs, 19 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1398. Up to 163 conditions per place. [2023-11-26 10:46:21,923 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 49 selfloop transitions, 24 changer transitions 11/90 dead transitions. [2023-11-26 10:46:21,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 963 flow [2023-11-26 10:46:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2023-11-26 10:46:21,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2023-11-26 10:46:21,925 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 207 transitions. [2023-11-26 10:46:21,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 207 transitions. [2023-11-26 10:46:21,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:21,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 207 transitions. [2023-11-26 10:46:21,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,928 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,929 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 670 flow. Second operand 9 states and 207 transitions. [2023-11-26 10:46:21,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 963 flow [2023-11-26 10:46:21,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 895 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:21,943 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 620 flow [2023-11-26 10:46:21,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2023-11-26 10:46:21,943 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2023-11-26 10:46:21,944 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 620 flow [2023-11-26 10:46:21,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:21,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:21,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:46:21,945 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:21,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:21,945 INFO L85 PathProgramCache]: Analyzing trace with hash -252884595, now seen corresponding path program 16 times [2023-11-26 10:46:21,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:21,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204906546] [2023-11-26 10:46:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:21,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204906546] [2023-11-26 10:46:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204906546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243353130] [2023-11-26 10:46:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:22,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:22,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 620 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:22,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:22,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:22,399 INFO L124 PetriNetUnfolderBase]: 173/330 cut-off events. [2023-11-26 10:46:22,399 INFO L125 PetriNetUnfolderBase]: For 1463/1465 co-relation queries the response was YES. [2023-11-26 10:46:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 330 events. 173/330 cut-off events. For 1463/1465 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1197 event pairs, 19 based on Foata normal form. 1/330 useless extension candidates. Maximal degree in co-relation 1414. Up to 167 conditions per place. [2023-11-26 10:46:22,403 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 46 selfloop transitions, 29 changer transitions 9/90 dead transitions. [2023-11-26 10:46:22,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 918 flow [2023-11-26 10:46:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2023-11-26 10:46:22,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2023-11-26 10:46:22,405 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 213 transitions. [2023-11-26 10:46:22,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 213 transitions. [2023-11-26 10:46:22,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:22,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 213 transitions. [2023-11-26 10:46:22,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,408 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,408 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 620 flow. Second operand 9 states and 213 transitions. [2023-11-26 10:46:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 918 flow [2023-11-26 10:46:22,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 860 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:22,419 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 658 flow [2023-11-26 10:46:22,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=658, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2023-11-26 10:46:22,420 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 50 predicate places. [2023-11-26 10:46:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 658 flow [2023-11-26 10:46:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:22,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:46:22,421 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:22,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1976775253, now seen corresponding path program 17 times [2023-11-26 10:46:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:22,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99238892] [2023-11-26 10:46:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99238892] [2023-11-26 10:46:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99238892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:22,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:22,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:22,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312208058] [2023-11-26 10:46:22,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:22,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:22,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:22,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 658 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:22,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:22,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:22,899 INFO L124 PetriNetUnfolderBase]: 170/330 cut-off events. [2023-11-26 10:46:22,899 INFO L125 PetriNetUnfolderBase]: For 1600/1602 co-relation queries the response was YES. [2023-11-26 10:46:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 330 events. 170/330 cut-off events. For 1600/1602 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1226 event pairs, 21 based on Foata normal form. 2/331 useless extension candidates. Maximal degree in co-relation 1422. Up to 177 conditions per place. [2023-11-26 10:46:22,903 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 45 selfloop transitions, 26 changer transitions 12/89 dead transitions. [2023-11-26 10:46:22,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 926 flow [2023-11-26 10:46:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2023-11-26 10:46:22,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2023-11-26 10:46:22,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 210 transitions. [2023-11-26 10:46:22,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 210 transitions. [2023-11-26 10:46:22,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:22,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 210 transitions. [2023-11-26 10:46:22,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,913 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,913 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 658 flow. Second operand 9 states and 210 transitions. [2023-11-26 10:46:22,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 926 flow [2023-11-26 10:46:22,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 852 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:22,925 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 614 flow [2023-11-26 10:46:22,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=614, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2023-11-26 10:46:22,926 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-11-26 10:46:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 614 flow [2023-11-26 10:46:22,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:22,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:22,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:46:22,928 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:22,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1774738495, now seen corresponding path program 18 times [2023-11-26 10:46:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:22,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187698047] [2023-11-26 10:46:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:22,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:23,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187698047] [2023-11-26 10:46:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187698047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:23,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:23,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384800208] [2023-11-26 10:46:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:23,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:23,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 614 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:23,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:23,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:23,343 INFO L124 PetriNetUnfolderBase]: 162/317 cut-off events. [2023-11-26 10:46:23,343 INFO L125 PetriNetUnfolderBase]: For 1457/1457 co-relation queries the response was YES. [2023-11-26 10:46:23,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 317 events. 162/317 cut-off events. For 1457/1457 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1142 event pairs, 21 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1333. Up to 167 conditions per place. [2023-11-26 10:46:23,347 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 44 selfloop transitions, 24 changer transitions 11/85 dead transitions. [2023-11-26 10:46:23,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 868 flow [2023-11-26 10:46:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2023-11-26 10:46:23,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276276276276276 [2023-11-26 10:46:23,348 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 209 transitions. [2023-11-26 10:46:23,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 209 transitions. [2023-11-26 10:46:23,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:23,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 209 transitions. [2023-11-26 10:46:23,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,351 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 614 flow. Second operand 9 states and 209 transitions. [2023-11-26 10:46:23,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 868 flow [2023-11-26 10:46:23,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 812 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:23,361 INFO L231 Difference]: Finished difference. Result has 88 places, 64 transitions, 576 flow [2023-11-26 10:46:23,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=88, PETRI_TRANSITIONS=64} [2023-11-26 10:46:23,362 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2023-11-26 10:46:23,362 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 64 transitions, 576 flow [2023-11-26 10:46:23,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:23,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:23,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 10:46:23,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:23,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1557870147, now seen corresponding path program 19 times [2023-11-26 10:46:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840725410] [2023-11-26 10:46:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:23,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:23,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840725410] [2023-11-26 10:46:23,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840725410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:23,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:23,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:23,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526027750] [2023-11-26 10:46:23,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:23,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:23,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:23,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:23,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 64 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:23,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:23,797 INFO L124 PetriNetUnfolderBase]: 167/320 cut-off events. [2023-11-26 10:46:23,797 INFO L125 PetriNetUnfolderBase]: For 1569/1571 co-relation queries the response was YES. [2023-11-26 10:46:23,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 320 events. 167/320 cut-off events. For 1569/1571 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1152 event pairs, 18 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1362. Up to 107 conditions per place. [2023-11-26 10:46:23,801 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 52 selfloop transitions, 22 changer transitions 9/89 dead transitions. [2023-11-26 10:46:23,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 911 flow [2023-11-26 10:46:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2023-11-26 10:46:23,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2023-11-26 10:46:23,804 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 207 transitions. [2023-11-26 10:46:23,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 207 transitions. [2023-11-26 10:46:23,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:23,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 207 transitions. [2023-11-26 10:46:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,806 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,806 INFO L175 Difference]: Start difference. First operand has 88 places, 64 transitions, 576 flow. Second operand 9 states and 207 transitions. [2023-11-26 10:46:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 911 flow [2023-11-26 10:46:23,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 853 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:23,817 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 590 flow [2023-11-26 10:46:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=590, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2023-11-26 10:46:23,818 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2023-11-26 10:46:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 590 flow [2023-11-26 10:46:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:23,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-26 10:46:23,819 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -926047497, now seen corresponding path program 20 times [2023-11-26 10:46:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424695327] [2023-11-26 10:46:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:23,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424695327] [2023-11-26 10:46:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424695327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:23,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015386161] [2023-11-26 10:46:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:23,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:23,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:23,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 590 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:23,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:23,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:23,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:24,256 INFO L124 PetriNetUnfolderBase]: 174/329 cut-off events. [2023-11-26 10:46:24,256 INFO L125 PetriNetUnfolderBase]: For 1736/1736 co-relation queries the response was YES. [2023-11-26 10:46:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 329 events. 174/329 cut-off events. For 1736/1736 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1205 event pairs, 23 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 1421. Up to 178 conditions per place. [2023-11-26 10:46:24,260 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 48 selfloop transitions, 25 changer transitions 10/89 dead transitions. [2023-11-26 10:46:24,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 889 flow [2023-11-26 10:46:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2023-11-26 10:46:24,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336336336336337 [2023-11-26 10:46:24,262 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 211 transitions. [2023-11-26 10:46:24,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 211 transitions. [2023-11-26 10:46:24,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:24,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 211 transitions. [2023-11-26 10:46:24,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,265 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 590 flow. Second operand 9 states and 211 transitions. [2023-11-26 10:46:24,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 889 flow [2023-11-26 10:46:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 816 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:24,277 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 590 flow [2023-11-26 10:46:24,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=590, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2023-11-26 10:46:24,278 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-11-26 10:46:24,278 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 590 flow [2023-11-26 10:46:24,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:24,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-26 10:46:24,280 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:24,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash 743055306, now seen corresponding path program 1 times [2023-11-26 10:46:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:24,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27195144] [2023-11-26 10:46:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:24,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27195144] [2023-11-26 10:46:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27195144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:24,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:24,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907086003] [2023-11-26 10:46:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:24,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:24,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:24,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:24,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:24,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:24,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:24,532 INFO L124 PetriNetUnfolderBase]: 211/443 cut-off events. [2023-11-26 10:46:24,532 INFO L125 PetriNetUnfolderBase]: For 2688/2690 co-relation queries the response was YES. [2023-11-26 10:46:24,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 443 events. 211/443 cut-off events. For 2688/2690 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2053 event pairs, 23 based on Foata normal form. 14/455 useless extension candidates. Maximal degree in co-relation 1953. Up to 112 conditions per place. [2023-11-26 10:46:24,538 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 56 selfloop transitions, 28 changer transitions 4/108 dead transitions. [2023-11-26 10:46:24,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 1095 flow [2023-11-26 10:46:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:46:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:46:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2023-11-26 10:46:24,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-26 10:46:24,540 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 182 transitions. [2023-11-26 10:46:24,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 182 transitions. [2023-11-26 10:46:24,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:24,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 182 transitions. [2023-11-26 10:46:24,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,541 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 590 flow. Second operand 7 states and 182 transitions. [2023-11-26 10:46:24,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 1095 flow [2023-11-26 10:46:24,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 108 transitions, 1025 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-26 10:46:24,556 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 807 flow [2023-11-26 10:46:24,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2023-11-26 10:46:24,557 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 52 predicate places. [2023-11-26 10:46:24,557 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 807 flow [2023-11-26 10:46:24,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:24,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:24,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-26 10:46:24,558 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:24,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash 446625982, now seen corresponding path program 2 times [2023-11-26 10:46:24,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:24,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858437361] [2023-11-26 10:46:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:24,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:24,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858437361] [2023-11-26 10:46:24,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858437361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:24,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:24,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826796655] [2023-11-26 10:46:24,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:24,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:24,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:24,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 807 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:24,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:24,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:24,844 INFO L124 PetriNetUnfolderBase]: 238/503 cut-off events. [2023-11-26 10:46:24,844 INFO L125 PetriNetUnfolderBase]: For 4066/4072 co-relation queries the response was YES. [2023-11-26 10:46:24,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 503 events. 238/503 cut-off events. For 4066/4072 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2355 event pairs, 44 based on Foata normal form. 14/513 useless extension candidates. Maximal degree in co-relation 2349. Up to 207 conditions per place. [2023-11-26 10:46:24,851 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 67 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2023-11-26 10:46:24,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 1178 flow [2023-11-26 10:46:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:46:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2023-11-26 10:46:24,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7675675675675676 [2023-11-26 10:46:24,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 142 transitions. [2023-11-26 10:46:24,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 142 transitions. [2023-11-26 10:46:24,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:24,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 142 transitions. [2023-11-26 10:46:24,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,854 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 807 flow. Second operand 5 states and 142 transitions. [2023-11-26 10:46:24,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 1178 flow [2023-11-26 10:46:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 1083 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-26 10:46:24,873 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 874 flow [2023-11-26 10:46:24,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2023-11-26 10:46:24,874 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 56 predicate places. [2023-11-26 10:46:24,874 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 874 flow [2023-11-26 10:46:24,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:24,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:24,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-26 10:46:24,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:24,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1830364305, now seen corresponding path program 1 times [2023-11-26 10:46:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:24,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736027251] [2023-11-26 10:46:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736027251] [2023-11-26 10:46:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736027251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598781755] [2023-11-26 10:46:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:24,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:24,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:25,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:25,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:25,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598781755] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:25,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:25,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-26 10:46:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991976707] [2023-11-26 10:46:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:25,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:25,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 874 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:25,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:25,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:25,481 INFO L124 PetriNetUnfolderBase]: 326/709 cut-off events. [2023-11-26 10:46:25,481 INFO L125 PetriNetUnfolderBase]: For 4545/4553 co-relation queries the response was YES. [2023-11-26 10:46:25,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 709 events. 326/709 cut-off events. For 4545/4553 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3837 event pairs, 15 based on Foata normal form. 17/724 useless extension candidates. Maximal degree in co-relation 3190. Up to 300 conditions per place. [2023-11-26 10:46:25,493 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 62 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2023-11-26 10:46:25,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1303 flow [2023-11-26 10:46:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:46:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2023-11-26 10:46:25,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7621621621621621 [2023-11-26 10:46:25,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 141 transitions. [2023-11-26 10:46:25,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 141 transitions. [2023-11-26 10:46:25,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:25,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 141 transitions. [2023-11-26 10:46:25,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,497 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 874 flow. Second operand 5 states and 141 transitions. [2023-11-26 10:46:25,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1303 flow [2023-11-26 10:46:25,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 1232 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:25,526 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 1054 flow [2023-11-26 10:46:25,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1054, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2023-11-26 10:46:25,527 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 62 predicate places. [2023-11-26 10:46:25,527 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 1054 flow [2023-11-26 10:46:25,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:25,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:25,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 10:46:25,734 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:25,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -954010672, now seen corresponding path program 3 times [2023-11-26 10:46:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626352017] [2023-11-26 10:46:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:25,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626352017] [2023-11-26 10:46:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626352017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:25,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298469027] [2023-11-26 10:46:25,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:25,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:25,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:25,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 1054 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:25,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:25,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:26,022 INFO L124 PetriNetUnfolderBase]: 311/705 cut-off events. [2023-11-26 10:46:26,023 INFO L125 PetriNetUnfolderBase]: For 4871/4881 co-relation queries the response was YES. [2023-11-26 10:46:26,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 705 events. 311/705 cut-off events. For 4871/4881 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3897 event pairs, 36 based on Foata normal form. 17/720 useless extension candidates. Maximal degree in co-relation 3182. Up to 154 conditions per place. [2023-11-26 10:46:26,033 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 30 changer transitions 4/126 dead transitions. [2023-11-26 10:46:26,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 126 transitions, 1476 flow [2023-11-26 10:46:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:46:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2023-11-26 10:46:26,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7128378378378378 [2023-11-26 10:46:26,035 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 211 transitions. [2023-11-26 10:46:26,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 211 transitions. [2023-11-26 10:46:26,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:26,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 211 transitions. [2023-11-26 10:46:26,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,037 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,037 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 1054 flow. Second operand 8 states and 211 transitions. [2023-11-26 10:46:26,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 126 transitions, 1476 flow [2023-11-26 10:46:26,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 1450 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:26,066 INFO L231 Difference]: Finished difference. Result has 108 places, 91 transitions, 1095 flow [2023-11-26 10:46:26,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=108, PETRI_TRANSITIONS=91} [2023-11-26 10:46:26,071 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 69 predicate places. [2023-11-26 10:46:26,072 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 91 transitions, 1095 flow [2023-11-26 10:46:26,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:26,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-26 10:46:26,073 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:26,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1633271091, now seen corresponding path program 2 times [2023-11-26 10:46:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472369085] [2023-11-26 10:46:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:26,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:26,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472369085] [2023-11-26 10:46:26,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472369085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:26,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:26,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732635636] [2023-11-26 10:46:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:26,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:26,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:26,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:26,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 91 transitions, 1095 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:26,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:26,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:26,379 INFO L124 PetriNetUnfolderBase]: 271/608 cut-off events. [2023-11-26 10:46:26,379 INFO L125 PetriNetUnfolderBase]: For 4768/4778 co-relation queries the response was YES. [2023-11-26 10:46:26,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2957 conditions, 608 events. 271/608 cut-off events. For 4768/4778 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3234 event pairs, 24 based on Foata normal form. 20/628 useless extension candidates. Maximal degree in co-relation 2913. Up to 170 conditions per place. [2023-11-26 10:46:26,388 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 64 selfloop transitions, 24 changer transitions 3/110 dead transitions. [2023-11-26 10:46:26,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 110 transitions, 1410 flow [2023-11-26 10:46:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:46:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2023-11-26 10:46:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-26 10:46:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 158 transitions. [2023-11-26 10:46:26,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 158 transitions. [2023-11-26 10:46:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 158 transitions. [2023-11-26 10:46:26,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,392 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,392 INFO L175 Difference]: Start difference. First operand has 108 places, 91 transitions, 1095 flow. Second operand 6 states and 158 transitions. [2023-11-26 10:46:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 110 transitions, 1410 flow [2023-11-26 10:46:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 1354 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-26 10:46:26,423 INFO L231 Difference]: Finished difference. Result has 111 places, 84 transitions, 1001 flow [2023-11-26 10:46:26,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=111, PETRI_TRANSITIONS=84} [2023-11-26 10:46:26,424 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2023-11-26 10:46:26,424 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 84 transitions, 1001 flow [2023-11-26 10:46:26,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:26,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:26,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-26 10:46:26,425 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:26,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash -203974936, now seen corresponding path program 4 times [2023-11-26 10:46:26,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708496331] [2023-11-26 10:46:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:26,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708496331] [2023-11-26 10:46:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708496331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:26,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486927586] [2023-11-26 10:46:26,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:26,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:26,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 84 transitions, 1001 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:26,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:26,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:26,680 INFO L124 PetriNetUnfolderBase]: 245/545 cut-off events. [2023-11-26 10:46:26,681 INFO L125 PetriNetUnfolderBase]: For 4369/4375 co-relation queries the response was YES. [2023-11-26 10:46:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 545 events. 245/545 cut-off events. For 4369/4375 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2717 event pairs, 30 based on Foata normal form. 14/556 useless extension candidates. Maximal degree in co-relation 2566. Up to 272 conditions per place. [2023-11-26 10:46:26,688 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 58 selfloop transitions, 21 changer transitions 1/99 dead transitions. [2023-11-26 10:46:26,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 99 transitions, 1206 flow [2023-11-26 10:46:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:46:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2023-11-26 10:46:26,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-26 10:46:26,691 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2023-11-26 10:46:26,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2023-11-26 10:46:26,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:26,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2023-11-26 10:46:26,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,693 INFO L175 Difference]: Start difference. First operand has 111 places, 84 transitions, 1001 flow. Second operand 5 states and 135 transitions. [2023-11-26 10:46:26,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 99 transitions, 1206 flow [2023-11-26 10:46:26,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 99 transitions, 1154 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:26,719 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 941 flow [2023-11-26 10:46:26,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=941, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2023-11-26 10:46:26,720 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 69 predicate places. [2023-11-26 10:46:26,720 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 941 flow [2023-11-26 10:46:26,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:26,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:26,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-26 10:46:26,721 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:26,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash 76354211, now seen corresponding path program 3 times [2023-11-26 10:46:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167654351] [2023-11-26 10:46:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:26,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167654351] [2023-11-26 10:46:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167654351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:26,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773999426] [2023-11-26 10:46:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:26,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:26,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 941 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:26,963 INFO L124 PetriNetUnfolderBase]: 306/666 cut-off events. [2023-11-26 10:46:26,963 INFO L125 PetriNetUnfolderBase]: For 5173/5176 co-relation queries the response was YES. [2023-11-26 10:46:26,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3252 conditions, 666 events. 306/666 cut-off events. For 5173/5176 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3472 event pairs, 95 based on Foata normal form. 12/671 useless extension candidates. Maximal degree in co-relation 3210. Up to 370 conditions per place. [2023-11-26 10:46:26,976 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 68 selfloop transitions, 31 changer transitions 0/118 dead transitions. [2023-11-26 10:46:26,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 1507 flow [2023-11-26 10:46:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:46:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2023-11-26 10:46:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.745945945945946 [2023-11-26 10:46:26,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 138 transitions. [2023-11-26 10:46:26,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 138 transitions. [2023-11-26 10:46:26,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:26,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 138 transitions. [2023-11-26 10:46:26,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,980 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,980 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 941 flow. Second operand 5 states and 138 transitions. [2023-11-26 10:46:26,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 1507 flow [2023-11-26 10:46:27,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 118 transitions, 1424 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-26 10:46:27,004 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 1226 flow [2023-11-26 10:46:27,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2023-11-26 10:46:27,005 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-26 10:46:27,005 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 1226 flow [2023-11-26 10:46:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:27,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-26 10:46:27,006 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:27,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash 186332560, now seen corresponding path program 5 times [2023-11-26 10:46:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:27,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14760494] [2023-11-26 10:46:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:27,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14760494] [2023-11-26 10:46:27,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14760494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:27,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:27,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252619242] [2023-11-26 10:46:27,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:27,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:27,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 97 transitions, 1226 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:27,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:27,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:27,270 INFO L124 PetriNetUnfolderBase]: 276/603 cut-off events. [2023-11-26 10:46:27,270 INFO L125 PetriNetUnfolderBase]: For 4702/4705 co-relation queries the response was YES. [2023-11-26 10:46:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3064 conditions, 603 events. 276/603 cut-off events. For 4702/4705 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3044 event pairs, 15 based on Foata normal form. 17/617 useless extension candidates. Maximal degree in co-relation 3026. Up to 186 conditions per place. [2023-11-26 10:46:27,280 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 68 selfloop transitions, 23 changer transitions 2/111 dead transitions. [2023-11-26 10:46:27,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 111 transitions, 1463 flow [2023-11-26 10:46:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:46:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2023-11-26 10:46:27,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-26 10:46:27,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 156 transitions. [2023-11-26 10:46:27,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 156 transitions. [2023-11-26 10:46:27,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:27,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 156 transitions. [2023-11-26 10:46:27,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,285 INFO L175 Difference]: Start difference. First operand has 106 places, 97 transitions, 1226 flow. Second operand 6 states and 156 transitions. [2023-11-26 10:46:27,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 111 transitions, 1463 flow [2023-11-26 10:46:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 1424 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:27,308 INFO L231 Difference]: Finished difference. Result has 109 places, 89 transitions, 1114 flow [2023-11-26 10:46:27,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2023-11-26 10:46:27,309 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 70 predicate places. [2023-11-26 10:46:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 1114 flow [2023-11-26 10:46:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:27,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-26 10:46:27,311 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:27,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -770991035, now seen corresponding path program 4 times [2023-11-26 10:46:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818141033] [2023-11-26 10:46:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:27,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818141033] [2023-11-26 10:46:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818141033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:27,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:27,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077019474] [2023-11-26 10:46:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:27,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:27,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 89 transitions, 1114 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:27,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:27,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:27,541 INFO L124 PetriNetUnfolderBase]: 261/565 cut-off events. [2023-11-26 10:46:27,542 INFO L125 PetriNetUnfolderBase]: For 4709/4713 co-relation queries the response was YES. [2023-11-26 10:46:27,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 565 events. 261/565 cut-off events. For 4709/4713 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2794 event pairs, 51 based on Foata normal form. 12/576 useless extension candidates. Maximal degree in co-relation 2870. Up to 165 conditions per place. [2023-11-26 10:46:27,548 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 61 selfloop transitions, 28 changer transitions 3/110 dead transitions. [2023-11-26 10:46:27,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 110 transitions, 1440 flow [2023-11-26 10:46:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:46:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:46:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2023-11-26 10:46:27,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6872586872586872 [2023-11-26 10:46:27,550 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 178 transitions. [2023-11-26 10:46:27,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 178 transitions. [2023-11-26 10:46:27,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:27,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 178 transitions. [2023-11-26 10:46:27,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,552 INFO L175 Difference]: Start difference. First operand has 109 places, 89 transitions, 1114 flow. Second operand 7 states and 178 transitions. [2023-11-26 10:46:27,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 110 transitions, 1440 flow [2023-11-26 10:46:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 1364 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:27,574 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 1096 flow [2023-11-26 10:46:27,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1096, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2023-11-26 10:46:27,575 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 68 predicate places. [2023-11-26 10:46:27,575 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 1096 flow [2023-11-26 10:46:27,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:27,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-26 10:46:27,576 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:27,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash -773213003, now seen corresponding path program 5 times [2023-11-26 10:46:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272127789] [2023-11-26 10:46:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272127789] [2023-11-26 10:46:27,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272127789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:27,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:27,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89582765] [2023-11-26 10:46:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:27,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:27,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:27,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2023-11-26 10:46:27,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 1096 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:27,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2023-11-26 10:46:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:27,810 INFO L124 PetriNetUnfolderBase]: 225/475 cut-off events. [2023-11-26 10:46:27,810 INFO L125 PetriNetUnfolderBase]: For 4072/4074 co-relation queries the response was YES. [2023-11-26 10:46:27,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 475 events. 225/475 cut-off events. For 4072/4074 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2184 event pairs, 40 based on Foata normal form. 6/480 useless extension candidates. Maximal degree in co-relation 2508. Up to 146 conditions per place. [2023-11-26 10:46:27,816 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 61 selfloop transitions, 27 changer transitions 2/108 dead transitions. [2023-11-26 10:46:27,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 108 transitions, 1363 flow [2023-11-26 10:46:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:46:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2023-11-26 10:46:27,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6858108108108109 [2023-11-26 10:46:27,817 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 203 transitions. [2023-11-26 10:46:27,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 203 transitions. [2023-11-26 10:46:27,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:27,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 203 transitions. [2023-11-26 10:46:27,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 25.375) internal successors, (203), 8 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,819 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 1096 flow. Second operand 8 states and 203 transitions. [2023-11-26 10:46:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 108 transitions, 1363 flow [2023-11-26 10:46:27,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 108 transitions, 1312 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-26 10:46:27,839 INFO L231 Difference]: Finished difference. Result has 111 places, 83 transitions, 1027 flow [2023-11-26 10:46:27,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=111, PETRI_TRANSITIONS=83} [2023-11-26 10:46:27,840 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2023-11-26 10:46:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 83 transitions, 1027 flow [2023-11-26 10:46:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:27,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:27,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-26 10:46:27,841 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:27,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 211575996, now seen corresponding path program 1 times [2023-11-26 10:46:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:27,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063903500] [2023-11-26 10:46:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063903500] [2023-11-26 10:46:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063903500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783016748] [2023-11-26 10:46:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:28,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:28,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:28,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:28,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:28,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:28,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:28,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783016748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:28,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112204991] [2023-11-26 10:46:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:28,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 83 transitions, 1027 flow. Second operand has 23 states, 23 states have (on average 18.73913043478261) internal successors, (431), 23 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:28,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:28,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:28,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:30,594 INFO L124 PetriNetUnfolderBase]: 677/1345 cut-off events. [2023-11-26 10:46:30,594 INFO L125 PetriNetUnfolderBase]: For 9605/9613 co-relation queries the response was YES. [2023-11-26 10:46:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6393 conditions, 1345 events. 677/1345 cut-off events. For 9605/9613 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7725 event pairs, 39 based on Foata normal form. 6/1351 useless extension candidates. Maximal degree in co-relation 6355. Up to 236 conditions per place. [2023-11-26 10:46:30,611 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 128 selfloop transitions, 85 changer transitions 64/283 dead transitions. [2023-11-26 10:46:30,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 283 transitions, 3326 flow [2023-11-26 10:46:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 10:46:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-26 10:46:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 814 transitions. [2023-11-26 10:46:30,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-26 10:46:30,622 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 814 transitions. [2023-11-26 10:46:30,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 814 transitions. [2023-11-26 10:46:30,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:30,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 814 transitions. [2023-11-26 10:46:30,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 22.61111111111111) internal successors, (814), 36 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:30,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:30,633 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 37.0) internal successors, (1369), 37 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:30,633 INFO L175 Difference]: Start difference. First operand has 111 places, 83 transitions, 1027 flow. Second operand 36 states and 814 transitions. [2023-11-26 10:46:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 283 transitions, 3326 flow [2023-11-26 10:46:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 283 transitions, 3113 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:30,675 INFO L231 Difference]: Finished difference. Result has 158 places, 131 transitions, 1922 flow [2023-11-26 10:46:30,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1922, PETRI_PLACES=158, PETRI_TRANSITIONS=131} [2023-11-26 10:46:30,676 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2023-11-26 10:46:30,676 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 131 transitions, 1922 flow [2023-11-26 10:46:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.73913043478261) internal successors, (431), 23 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:30,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:30,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:30,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:30,883 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 827257144, now seen corresponding path program 2 times [2023-11-26 10:46:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272156285] [2023-11-26 10:46:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:31,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:31,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272156285] [2023-11-26 10:46:31,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272156285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417998115] [2023-11-26 10:46:31,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:31,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:31,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:31,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:31,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:31,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:31,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:31,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417998115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:31,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:31,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24251044] [2023-11-26 10:46:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:31,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:31,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:31,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 131 transitions, 1922 flow. Second operand has 23 states, 23 states have (on average 18.47826086956522) internal successors, (425), 23 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:31,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:31,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:31,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:32,456 INFO L124 PetriNetUnfolderBase]: 749/1584 cut-off events. [2023-11-26 10:46:32,456 INFO L125 PetriNetUnfolderBase]: For 11959/11971 co-relation queries the response was YES. [2023-11-26 10:46:32,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 1584 events. 749/1584 cut-off events. For 11959/11971 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9851 event pairs, 101 based on Foata normal form. 6/1590 useless extension candidates. Maximal degree in co-relation 7698. Up to 612 conditions per place. [2023-11-26 10:46:32,475 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 101 selfloop transitions, 97 changer transitions 16/220 dead transitions. [2023-11-26 10:46:32,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 220 transitions, 3295 flow [2023-11-26 10:46:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:46:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 10:46:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 324 transitions. [2023-11-26 10:46:32,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6254826254826255 [2023-11-26 10:46:32,477 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 324 transitions. [2023-11-26 10:46:32,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 324 transitions. [2023-11-26 10:46:32,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:32,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 324 transitions. [2023-11-26 10:46:32,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:32,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:32,484 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 37.0) internal successors, (555), 15 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:32,485 INFO L175 Difference]: Start difference. First operand has 158 places, 131 transitions, 1922 flow. Second operand 14 states and 324 transitions. [2023-11-26 10:46:32,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 220 transitions, 3295 flow [2023-11-26 10:46:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 220 transitions, 2773 flow, removed 182 selfloop flow, removed 16 redundant places. [2023-11-26 10:46:32,570 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 2219 flow [2023-11-26 10:46:32,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2219, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2023-11-26 10:46:32,571 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 110 predicate places. [2023-11-26 10:46:32,571 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 2219 flow [2023-11-26 10:46:32,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.47826086956522) internal successors, (425), 23 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:32,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:32,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:32,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:32,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-26 10:46:32,778 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:32,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1265581732, now seen corresponding path program 3 times [2023-11-26 10:46:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:32,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327172821] [2023-11-26 10:46:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:32,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327172821] [2023-11-26 10:46:32,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327172821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:32,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185935903] [2023-11-26 10:46:32,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:32,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:32,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:33,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:46:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:33,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:33,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:33,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185935903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339219154] [2023-11-26 10:46:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:33,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:33,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 2219 flow. Second operand has 23 states, 23 states have (on average 18.52173913043478) internal successors, (426), 23 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:33,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:33,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:33,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:34,625 INFO L124 PetriNetUnfolderBase]: 892/1902 cut-off events. [2023-11-26 10:46:34,625 INFO L125 PetriNetUnfolderBase]: For 12900/12920 co-relation queries the response was YES. [2023-11-26 10:46:34,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8793 conditions, 1902 events. 892/1902 cut-off events. For 12900/12920 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12585 event pairs, 107 based on Foata normal form. 14/1916 useless extension candidates. Maximal degree in co-relation 8741. Up to 584 conditions per place. [2023-11-26 10:46:34,646 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 85 selfloop transitions, 151 changer transitions 12/254 dead transitions. [2023-11-26 10:46:34,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 3694 flow [2023-11-26 10:46:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:46:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 10:46:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 385 transitions. [2023-11-26 10:46:34,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6120826709062003 [2023-11-26 10:46:34,648 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 385 transitions. [2023-11-26 10:46:34,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 385 transitions. [2023-11-26 10:46:34,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:34,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 385 transitions. [2023-11-26 10:46:34,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:34,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 37.0) internal successors, (666), 18 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:34,651 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 37.0) internal successors, (666), 18 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:34,651 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 2219 flow. Second operand 17 states and 385 transitions. [2023-11-26 10:46:34,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 3694 flow [2023-11-26 10:46:34,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 254 transitions, 3589 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:34,731 INFO L231 Difference]: Finished difference. Result has 164 places, 207 transitions, 3269 flow [2023-11-26 10:46:34,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3269, PETRI_PLACES=164, PETRI_TRANSITIONS=207} [2023-11-26 10:46:34,732 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 125 predicate places. [2023-11-26 10:46:34,732 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 207 transitions, 3269 flow [2023-11-26 10:46:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.52173913043478) internal successors, (426), 23 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:34,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:34,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:34,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 10:46:34,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:34,938 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:34,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash -612595184, now seen corresponding path program 4 times [2023-11-26 10:46:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:34,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141139611] [2023-11-26 10:46:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:34,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:35,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141139611] [2023-11-26 10:46:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141139611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219495118] [2023-11-26 10:46:35,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:35,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:35,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:46:35,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:35,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:35,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:35,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:35,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219495118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:35,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:35,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789872601] [2023-11-26 10:46:35,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:35,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:35,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:35,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 207 transitions, 3269 flow. Second operand has 23 states, 23 states have (on average 18.608695652173914) internal successors, (428), 23 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:35,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:36,761 INFO L124 PetriNetUnfolderBase]: 870/1846 cut-off events. [2023-11-26 10:46:36,761 INFO L125 PetriNetUnfolderBase]: For 15938/15946 co-relation queries the response was YES. [2023-11-26 10:46:36,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 1846 events. 870/1846 cut-off events. For 15938/15946 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12047 event pairs, 93 based on Foata normal form. 8/1854 useless extension candidates. Maximal degree in co-relation 9531. Up to 590 conditions per place. [2023-11-26 10:46:36,778 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 87 selfloop transitions, 144 changer transitions 17/254 dead transitions. [2023-11-26 10:46:36,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 254 transitions, 4091 flow [2023-11-26 10:46:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:46:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 10:46:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 385 transitions. [2023-11-26 10:46:36,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6120826709062003 [2023-11-26 10:46:36,780 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 385 transitions. [2023-11-26 10:46:36,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 385 transitions. [2023-11-26 10:46:36,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:36,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 385 transitions. [2023-11-26 10:46:36,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:36,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 37.0) internal successors, (666), 18 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:36,784 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 37.0) internal successors, (666), 18 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:36,784 INFO L175 Difference]: Start difference. First operand has 164 places, 207 transitions, 3269 flow. Second operand 17 states and 385 transitions. [2023-11-26 10:46:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 254 transitions, 4091 flow [2023-11-26 10:46:36,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 254 transitions, 3896 flow, removed 78 selfloop flow, removed 4 redundant places. [2023-11-26 10:46:36,915 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 3313 flow [2023-11-26 10:46:36,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3313, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2023-11-26 10:46:36,916 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 138 predicate places. [2023-11-26 10:46:36,916 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 3313 flow [2023-11-26 10:46:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.608695652173914) internal successors, (428), 23 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:36,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:36,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:36,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:37,122 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:37,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 899505320, now seen corresponding path program 5 times [2023-11-26 10:46:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:37,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947990899] [2023-11-26 10:46:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947990899] [2023-11-26 10:46:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947990899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306938793] [2023-11-26 10:46:37,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:46:37,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:37,303 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:37,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:46:37,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:37,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:46:37,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:37,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306938793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:37,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:37,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-26 10:46:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947307607] [2023-11-26 10:46:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:37,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:37,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:46:37,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:37,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 3313 flow. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:37,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:38,049 INFO L124 PetriNetUnfolderBase]: 798/1679 cut-off events. [2023-11-26 10:46:38,049 INFO L125 PetriNetUnfolderBase]: For 15892/15900 co-relation queries the response was YES. [2023-11-26 10:46:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9250 conditions, 1679 events. 798/1679 cut-off events. For 15892/15900 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10428 event pairs, 158 based on Foata normal form. 6/1685 useless extension candidates. Maximal degree in co-relation 9192. Up to 988 conditions per place. [2023-11-26 10:46:38,068 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 123 selfloop transitions, 61 changer transitions 45/235 dead transitions. [2023-11-26 10:46:38,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 4108 flow [2023-11-26 10:46:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2023-11-26 10:46:38,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276276276276276 [2023-11-26 10:46:38,070 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 209 transitions. [2023-11-26 10:46:38,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 209 transitions. [2023-11-26 10:46:38,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:38,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 209 transitions. [2023-11-26 10:46:38,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:38,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:38,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:38,072 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 3313 flow. Second operand 9 states and 209 transitions. [2023-11-26 10:46:38,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 4108 flow [2023-11-26 10:46:38,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 235 transitions, 3854 flow, removed 6 selfloop flow, removed 14 redundant places. [2023-11-26 10:46:38,173 INFO L231 Difference]: Finished difference. Result has 171 places, 177 transitions, 2711 flow [2023-11-26 10:46:38,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2711, PETRI_PLACES=171, PETRI_TRANSITIONS=177} [2023-11-26 10:46:38,174 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-11-26 10:46:38,174 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 177 transitions, 2711 flow [2023-11-26 10:46:38,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:38,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:38,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:38,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:38,382 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -435562226, now seen corresponding path program 6 times [2023-11-26 10:46:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695823430] [2023-11-26 10:46:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:38,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695823430] [2023-11-26 10:46:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695823430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796177886] [2023-11-26 10:46:38,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:46:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:38,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:38,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:46:38,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 10:46:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:38,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:46:38,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:38,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796177886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-26 10:46:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514271163] [2023-11-26 10:46:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:46:38,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:38,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 177 transitions, 2711 flow. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:38,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:38,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:38,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:39,245 INFO L124 PetriNetUnfolderBase]: 741/1590 cut-off events. [2023-11-26 10:46:39,246 INFO L125 PetriNetUnfolderBase]: For 13319/13319 co-relation queries the response was YES. [2023-11-26 10:46:39,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 1590 events. 741/1590 cut-off events. For 13319/13319 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9894 event pairs, 178 based on Foata normal form. 5/1594 useless extension candidates. Maximal degree in co-relation 7951. Up to 978 conditions per place. [2023-11-26 10:46:39,263 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 117 selfloop transitions, 55 changer transitions 26/204 dead transitions. [2023-11-26 10:46:39,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 3381 flow [2023-11-26 10:46:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:46:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2023-11-26 10:46:39,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6246246246246246 [2023-11-26 10:46:39,265 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 208 transitions. [2023-11-26 10:46:39,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 208 transitions. [2023-11-26 10:46:39,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:39,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 208 transitions. [2023-11-26 10:46:39,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.11111111111111) internal successors, (208), 9 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:39,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:39,267 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:39,267 INFO L175 Difference]: Start difference. First operand has 171 places, 177 transitions, 2711 flow. Second operand 9 states and 208 transitions. [2023-11-26 10:46:39,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 3381 flow [2023-11-26 10:46:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 204 transitions, 3057 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-11-26 10:46:39,378 INFO L231 Difference]: Finished difference. Result has 153 places, 162 transitions, 2296 flow [2023-11-26 10:46:39,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2296, PETRI_PLACES=153, PETRI_TRANSITIONS=162} [2023-11-26 10:46:39,379 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 114 predicate places. [2023-11-26 10:46:39,379 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 162 transitions, 2296 flow [2023-11-26 10:46:39,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:39,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:39,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:39,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:39,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:39,596 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:39,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1298803742, now seen corresponding path program 7 times [2023-11-26 10:46:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195715879] [2023-11-26 10:46:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:39,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:39,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195715879] [2023-11-26 10:46:39,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195715879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:39,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698142794] [2023-11-26 10:46:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:46:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:39,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:39,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:39,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:40,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698142794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:40,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170161910] [2023-11-26 10:46:40,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:40,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:40,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:40,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:40,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 162 transitions, 2296 flow. Second operand has 23 states, 23 states have (on average 18.52173913043478) internal successors, (426), 23 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:40,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:40,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:40,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:40,939 INFO L124 PetriNetUnfolderBase]: 660/1356 cut-off events. [2023-11-26 10:46:40,939 INFO L125 PetriNetUnfolderBase]: For 10904/10912 co-relation queries the response was YES. [2023-11-26 10:46:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6744 conditions, 1356 events. 660/1356 cut-off events. For 10904/10912 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7828 event pairs, 70 based on Foata normal form. 11/1367 useless extension candidates. Maximal degree in co-relation 6691. Up to 455 conditions per place. [2023-11-26 10:46:40,949 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 79 selfloop transitions, 72 changer transitions 48/205 dead transitions. [2023-11-26 10:46:40,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 205 transitions, 3074 flow [2023-11-26 10:46:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 10:46:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2023-11-26 10:46:40,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112266112266113 [2023-11-26 10:46:40,952 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 294 transitions. [2023-11-26 10:46:40,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 294 transitions. [2023-11-26 10:46:40,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:40,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 294 transitions. [2023-11-26 10:46:40,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 22.615384615384617) internal successors, (294), 13 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:40,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:40,955 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:40,955 INFO L175 Difference]: Start difference. First operand has 153 places, 162 transitions, 2296 flow. Second operand 13 states and 294 transitions. [2023-11-26 10:46:40,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 205 transitions, 3074 flow [2023-11-26 10:46:41,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 205 transitions, 2950 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-26 10:46:41,011 INFO L231 Difference]: Finished difference. Result has 154 places, 131 transitions, 1862 flow [2023-11-26 10:46:41,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1862, PETRI_PLACES=154, PETRI_TRANSITIONS=131} [2023-11-26 10:46:41,012 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 115 predicate places. [2023-11-26 10:46:41,012 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 131 transitions, 1862 flow [2023-11-26 10:46:41,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.52173913043478) internal successors, (426), 23 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:41,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:41,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:41,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 10:46:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:41,218 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:41,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 158369650, now seen corresponding path program 8 times [2023-11-26 10:46:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207900245] [2023-11-26 10:46:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:41,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207900245] [2023-11-26 10:46:41,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207900245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:41,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764834711] [2023-11-26 10:46:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:41,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:41,398 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:41,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:46:41,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:41,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:41,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:41,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:41,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764834711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:42,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962764881] [2023-11-26 10:46:42,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:42,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:42,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 131 transitions, 1862 flow. Second operand has 23 states, 23 states have (on average 18.47826086956522) internal successors, (425), 23 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:42,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:42,585 INFO L124 PetriNetUnfolderBase]: 500/1081 cut-off events. [2023-11-26 10:46:42,586 INFO L125 PetriNetUnfolderBase]: For 8416/8424 co-relation queries the response was YES. [2023-11-26 10:46:42,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5324 conditions, 1081 events. 500/1081 cut-off events. For 8416/8424 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6132 event pairs, 79 based on Foata normal form. 6/1087 useless extension candidates. Maximal degree in co-relation 5273. Up to 449 conditions per place. [2023-11-26 10:46:42,595 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 79 selfloop transitions, 61 changer transitions 26/172 dead transitions. [2023-11-26 10:46:42,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 172 transitions, 2527 flow [2023-11-26 10:46:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:46:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:46:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2023-11-26 10:46:42,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261261261261262 [2023-11-26 10:46:42,597 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 278 transitions. [2023-11-26 10:46:42,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 278 transitions. [2023-11-26 10:46:42,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:42,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 278 transitions. [2023-11-26 10:46:42,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.166666666666668) internal successors, (278), 12 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:42,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:42,600 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:42,600 INFO L175 Difference]: Start difference. First operand has 154 places, 131 transitions, 1862 flow. Second operand 12 states and 278 transitions. [2023-11-26 10:46:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 172 transitions, 2527 flow [2023-11-26 10:46:42,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 172 transitions, 2358 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-11-26 10:46:42,644 INFO L231 Difference]: Finished difference. Result has 149 places, 118 transitions, 1655 flow [2023-11-26 10:46:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1655, PETRI_PLACES=149, PETRI_TRANSITIONS=118} [2023-11-26 10:46:42,645 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 110 predicate places. [2023-11-26 10:46:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 118 transitions, 1655 flow [2023-11-26 10:46:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.47826086956522) internal successors, (425), 23 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:42,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:42,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-26 10:46:42,851 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:42,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1478803898, now seen corresponding path program 9 times [2023-11-26 10:46:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925440622] [2023-11-26 10:46:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:43,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925440622] [2023-11-26 10:46:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925440622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769953140] [2023-11-26 10:46:43,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:43,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:43,029 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:43,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:46:43,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:46:43,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:43,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:43,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:43,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769953140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:43,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:43,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-11-26 10:46:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470391051] [2023-11-26 10:46:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:43,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:46:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:46:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:46:43,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:43,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 118 transitions, 1655 flow. Second operand has 20 states, 20 states have (on average 18.6) internal successors, (372), 20 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:44,694 INFO L124 PetriNetUnfolderBase]: 603/1249 cut-off events. [2023-11-26 10:46:44,694 INFO L125 PetriNetUnfolderBase]: For 11398/11410 co-relation queries the response was YES. [2023-11-26 10:46:44,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6546 conditions, 1249 events. 603/1249 cut-off events. For 11398/11410 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7096 event pairs, 30 based on Foata normal form. 18/1267 useless extension candidates. Maximal degree in co-relation 6495. Up to 292 conditions per place. [2023-11-26 10:46:44,707 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 84 selfloop transitions, 123 changer transitions 21/234 dead transitions. [2023-11-26 10:46:44,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 234 transitions, 3425 flow [2023-11-26 10:46:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 10:46:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 10:46:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 586 transitions. [2023-11-26 10:46:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865865865865866 [2023-11-26 10:46:44,709 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 586 transitions. [2023-11-26 10:46:44,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 586 transitions. [2023-11-26 10:46:44,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:44,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 586 transitions. [2023-11-26 10:46:44,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 21.703703703703702) internal successors, (586), 27 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:44,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 37.0) internal successors, (1036), 28 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:44,714 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 37.0) internal successors, (1036), 28 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:44,714 INFO L175 Difference]: Start difference. First operand has 149 places, 118 transitions, 1655 flow. Second operand 27 states and 586 transitions. [2023-11-26 10:46:44,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 234 transitions, 3425 flow [2023-11-26 10:46:44,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 234 transitions, 3176 flow, removed 35 selfloop flow, removed 12 redundant places. [2023-11-26 10:46:44,767 INFO L231 Difference]: Finished difference. Result has 166 places, 177 transitions, 2874 flow [2023-11-26 10:46:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2874, PETRI_PLACES=166, PETRI_TRANSITIONS=177} [2023-11-26 10:46:44,768 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 127 predicate places. [2023-11-26 10:46:44,768 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 177 transitions, 2874 flow [2023-11-26 10:46:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.6) internal successors, (372), 20 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:44,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:44,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:44,975 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:44,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:44,975 INFO L85 PathProgramCache]: Analyzing trace with hash -837690874, now seen corresponding path program 10 times [2023-11-26 10:46:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:44,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634721875] [2023-11-26 10:46:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:45,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634721875] [2023-11-26 10:46:45,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634721875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496332756] [2023-11-26 10:46:45,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:45,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:45,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:45,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:45,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:46:45,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:45,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:45,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:45,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:45,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496332756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:45,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:45,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-11-26 10:46:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675903023] [2023-11-26 10:46:45,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:46:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:45,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:46:45,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:46:45,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:45,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 177 transitions, 2874 flow. Second operand has 22 states, 22 states have (on average 18.5) internal successors, (407), 22 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:45,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:45,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:46,411 INFO L124 PetriNetUnfolderBase]: 673/1392 cut-off events. [2023-11-26 10:46:46,411 INFO L125 PetriNetUnfolderBase]: For 14232/14242 co-relation queries the response was YES. [2023-11-26 10:46:46,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7877 conditions, 1392 events. 673/1392 cut-off events. For 14232/14242 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8157 event pairs, 126 based on Foata normal form. 5/1397 useless extension candidates. Maximal degree in co-relation 7820. Up to 682 conditions per place. [2023-11-26 10:46:46,421 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 115 selfloop transitions, 101 changer transitions 22/244 dead transitions. [2023-11-26 10:46:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 4216 flow [2023-11-26 10:46:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 10:46:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2023-11-26 10:46:46,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008316008316008 [2023-11-26 10:46:46,423 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 289 transitions. [2023-11-26 10:46:46,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 289 transitions. [2023-11-26 10:46:46,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:46,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 289 transitions. [2023-11-26 10:46:46,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,426 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,426 INFO L175 Difference]: Start difference. First operand has 166 places, 177 transitions, 2874 flow. Second operand 13 states and 289 transitions. [2023-11-26 10:46:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 4216 flow [2023-11-26 10:46:46,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 244 transitions, 3754 flow, removed 178 selfloop flow, removed 8 redundant places. [2023-11-26 10:46:46,532 INFO L231 Difference]: Finished difference. Result has 171 places, 192 transitions, 3062 flow [2023-11-26 10:46:46,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3062, PETRI_PLACES=171, PETRI_TRANSITIONS=192} [2023-11-26 10:46:46,533 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2023-11-26 10:46:46,533 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 192 transitions, 3062 flow [2023-11-26 10:46:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.5) internal successors, (407), 22 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:46,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:46,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:46,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:46,740 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:46,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1378830902, now seen corresponding path program 11 times [2023-11-26 10:46:46,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:46,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16619979] [2023-11-26 10:46:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:46,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:46,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:46,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16619979] [2023-11-26 10:46:46,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16619979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:46,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036198566] [2023-11-26 10:46:46,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:46:46,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:46,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:46,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:46:46,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:46,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:46,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:46:46,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:47,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036198566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:47,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-26 10:46:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770411967] [2023-11-26 10:46:47,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:47,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:46:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:46:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:46:47,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:47,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 192 transitions, 3062 flow. Second operand has 20 states, 20 states have (on average 18.8) internal successors, (376), 20 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:47,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:47,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:47,833 INFO L124 PetriNetUnfolderBase]: 655/1347 cut-off events. [2023-11-26 10:46:47,834 INFO L125 PetriNetUnfolderBase]: For 13271/13279 co-relation queries the response was YES. [2023-11-26 10:46:47,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7435 conditions, 1347 events. 655/1347 cut-off events. For 13271/13279 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7801 event pairs, 107 based on Foata normal form. 4/1351 useless extension candidates. Maximal degree in co-relation 7378. Up to 706 conditions per place. [2023-11-26 10:46:47,847 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 113 selfloop transitions, 64 changer transitions 41/224 dead transitions. [2023-11-26 10:46:47,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 3708 flow [2023-11-26 10:46:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 10:46:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2023-11-26 10:46:47,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070686070686071 [2023-11-26 10:46:47,848 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 292 transitions. [2023-11-26 10:46:47,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 292 transitions. [2023-11-26 10:46:47,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:47,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 292 transitions. [2023-11-26 10:46:47,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 22.46153846153846) internal successors, (292), 13 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,851 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,851 INFO L175 Difference]: Start difference. First operand has 171 places, 192 transitions, 3062 flow. Second operand 13 states and 292 transitions. [2023-11-26 10:46:47,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 3708 flow [2023-11-26 10:46:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 224 transitions, 3614 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:47,935 INFO L231 Difference]: Finished difference. Result has 176 places, 165 transitions, 2562 flow [2023-11-26 10:46:47,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2562, PETRI_PLACES=176, PETRI_TRANSITIONS=165} [2023-11-26 10:46:47,936 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2023-11-26 10:46:47,936 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 165 transitions, 2562 flow [2023-11-26 10:46:47,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.8) internal successors, (376), 20 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:47,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:47,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:48,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-26 10:46:48,137 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:48,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -972013248, now seen corresponding path program 12 times [2023-11-26 10:46:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179810390] [2023-11-26 10:46:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:48,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:48,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179810390] [2023-11-26 10:46:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179810390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520240519] [2023-11-26 10:46:48,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:46:48,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:48,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:48,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:46:48,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 10:46:48,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:48,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:48,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:48,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:48,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520240519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:48,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:48,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2023-11-26 10:46:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065102524] [2023-11-26 10:46:48,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:46:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:46:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:48,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:48,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 165 transitions, 2562 flow. Second operand has 19 states, 19 states have (on average 18.526315789473685) internal successors, (352), 19 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:48,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:48,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:49,825 INFO L124 PetriNetUnfolderBase]: 590/1278 cut-off events. [2023-11-26 10:46:49,825 INFO L125 PetriNetUnfolderBase]: For 12680/12682 co-relation queries the response was YES. [2023-11-26 10:46:49,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 1278 events. 590/1278 cut-off events. For 12680/12682 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7569 event pairs, 49 based on Foata normal form. 15/1293 useless extension candidates. Maximal degree in co-relation 6694. Up to 334 conditions per place. [2023-11-26 10:46:49,834 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 81 selfloop transitions, 112 changer transitions 24/223 dead transitions. [2023-11-26 10:46:49,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 223 transitions, 3376 flow [2023-11-26 10:46:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 10:46:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 10:46:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 538 transitions. [2023-11-26 10:46:49,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816216216216217 [2023-11-26 10:46:49,836 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 538 transitions. [2023-11-26 10:46:49,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 538 transitions. [2023-11-26 10:46:49,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:49,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 538 transitions. [2023-11-26 10:46:49,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 21.52) internal successors, (538), 25 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:49,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:49,840 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:49,840 INFO L175 Difference]: Start difference. First operand has 176 places, 165 transitions, 2562 flow. Second operand 25 states and 538 transitions. [2023-11-26 10:46:49,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 223 transitions, 3376 flow [2023-11-26 10:46:49,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 223 transitions, 3106 flow, removed 16 selfloop flow, removed 18 redundant places. [2023-11-26 10:46:49,895 INFO L231 Difference]: Finished difference. Result has 180 places, 165 transitions, 2581 flow [2023-11-26 10:46:49,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2581, PETRI_PLACES=180, PETRI_TRANSITIONS=165} [2023-11-26 10:46:49,896 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2023-11-26 10:46:49,896 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 165 transitions, 2581 flow [2023-11-26 10:46:49,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.526315789473685) internal successors, (352), 19 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:49,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:49,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:49,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:50,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-26 10:46:50,097 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash 340129468, now seen corresponding path program 13 times [2023-11-26 10:46:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514119812] [2023-11-26 10:46:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:50,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514119812] [2023-11-26 10:46:50,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514119812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114431905] [2023-11-26 10:46:50,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:46:50,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:50,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:50,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:46:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:50,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:50,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:50,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114431905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:50,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:50,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-26 10:46:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964792162] [2023-11-26 10:46:50,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:46:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:46:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:46:50,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:50,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 165 transitions, 2581 flow. Second operand has 21 states, 21 states have (on average 18.476190476190474) internal successors, (388), 21 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:50,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:50,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:50,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:51,581 INFO L124 PetriNetUnfolderBase]: 658/1476 cut-off events. [2023-11-26 10:46:51,581 INFO L125 PetriNetUnfolderBase]: For 12924/12946 co-relation queries the response was YES. [2023-11-26 10:46:51,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7561 conditions, 1476 events. 658/1476 cut-off events. For 12924/12946 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9554 event pairs, 40 based on Foata normal form. 13/1489 useless extension candidates. Maximal degree in co-relation 7506. Up to 389 conditions per place. [2023-11-26 10:46:51,591 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 91 selfloop transitions, 123 changer transitions 23/243 dead transitions. [2023-11-26 10:46:51,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 243 transitions, 3836 flow [2023-11-26 10:46:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 10:46:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 10:46:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 489 transitions. [2023-11-26 10:46:51,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007371007371007 [2023-11-26 10:46:51,593 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 489 transitions. [2023-11-26 10:46:51,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 489 transitions. [2023-11-26 10:46:51,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:51,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 489 transitions. [2023-11-26 10:46:51,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 22.227272727272727) internal successors, (489), 22 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,596 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,596 INFO L175 Difference]: Start difference. First operand has 180 places, 165 transitions, 2581 flow. Second operand 22 states and 489 transitions. [2023-11-26 10:46:51,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 243 transitions, 3836 flow [2023-11-26 10:46:51,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 243 transitions, 3576 flow, removed 27 selfloop flow, removed 19 redundant places. [2023-11-26 10:46:51,665 INFO L231 Difference]: Finished difference. Result has 181 places, 184 transitions, 2955 flow [2023-11-26 10:46:51,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2955, PETRI_PLACES=181, PETRI_TRANSITIONS=184} [2023-11-26 10:46:51,666 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 142 predicate places. [2023-11-26 10:46:51,666 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 184 transitions, 2955 flow [2023-11-26 10:46:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.476190476190474) internal successors, (388), 21 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:51,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:51,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-26 10:46:51,869 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1739502662, now seen corresponding path program 14 times [2023-11-26 10:46:51,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:51,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769189692] [2023-11-26 10:46:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769189692] [2023-11-26 10:46:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769189692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878899849] [2023-11-26 10:46:52,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:52,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:52,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:52,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:52,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:46:52,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:52,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:52,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:52,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878899849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:52,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:52,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-26 10:46:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490896850] [2023-11-26 10:46:52,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:52,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:46:52,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:52,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:46:52,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:46:52,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:52,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 184 transitions, 2955 flow. Second operand has 24 states, 24 states have (on average 18.458333333333332) internal successors, (443), 24 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:52,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:52,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:52,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:53,605 INFO L124 PetriNetUnfolderBase]: 933/2139 cut-off events. [2023-11-26 10:46:53,605 INFO L125 PetriNetUnfolderBase]: For 18772/18800 co-relation queries the response was YES. [2023-11-26 10:46:53,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10834 conditions, 2139 events. 933/2139 cut-off events. For 18772/18800 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15375 event pairs, 161 based on Foata normal form. 28/2167 useless extension candidates. Maximal degree in co-relation 10778. Up to 755 conditions per place. [2023-11-26 10:46:53,628 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 143 selfloop transitions, 92 changer transitions 86/327 dead transitions. [2023-11-26 10:46:53,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 327 transitions, 5452 flow [2023-11-26 10:46:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:46:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 10:46:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 613 transitions. [2023-11-26 10:46:53,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916988416988417 [2023-11-26 10:46:53,630 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 613 transitions. [2023-11-26 10:46:53,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 613 transitions. [2023-11-26 10:46:53,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:53,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 613 transitions. [2023-11-26 10:46:53,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 21.892857142857142) internal successors, (613), 28 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,634 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,635 INFO L175 Difference]: Start difference. First operand has 181 places, 184 transitions, 2955 flow. Second operand 28 states and 613 transitions. [2023-11-26 10:46:53,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 327 transitions, 5452 flow [2023-11-26 10:46:53,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 327 transitions, 4878 flow, removed 99 selfloop flow, removed 10 redundant places. [2023-11-26 10:46:53,738 INFO L231 Difference]: Finished difference. Result has 203 places, 172 transitions, 2764 flow [2023-11-26 10:46:53,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2764, PETRI_PLACES=203, PETRI_TRANSITIONS=172} [2023-11-26 10:46:53,739 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 164 predicate places. [2023-11-26 10:46:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 172 transitions, 2764 flow [2023-11-26 10:46:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.458333333333332) internal successors, (443), 24 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:53,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:53,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:53,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-26 10:46:53,941 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:53,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1435471996, now seen corresponding path program 15 times [2023-11-26 10:46:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:53,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742463617] [2023-11-26 10:46:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:54,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742463617] [2023-11-26 10:46:54,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742463617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198682708] [2023-11-26 10:46:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:54,087 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:54,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 10:46:54,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:46:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:54,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:54,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:54,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:54,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198682708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:54,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:54,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-26 10:46:54,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370880737] [2023-11-26 10:46:54,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:54,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:46:54,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:46:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:46:54,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 172 transitions, 2764 flow. Second operand has 21 states, 21 states have (on average 18.523809523809526) internal successors, (389), 21 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:55,713 INFO L124 PetriNetUnfolderBase]: 743/1695 cut-off events. [2023-11-26 10:46:55,713 INFO L125 PetriNetUnfolderBase]: For 14143/14155 co-relation queries the response was YES. [2023-11-26 10:46:55,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8082 conditions, 1695 events. 743/1695 cut-off events. For 14143/14155 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11375 event pairs, 57 based on Foata normal form. 8/1703 useless extension candidates. Maximal degree in co-relation 8033. Up to 473 conditions per place. [2023-11-26 10:46:55,730 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 79 selfloop transitions, 108 changer transitions 42/235 dead transitions. [2023-11-26 10:46:55,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 235 transitions, 3501 flow [2023-11-26 10:46:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 10:46:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 10:46:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 545 transitions. [2023-11-26 10:46:55,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891891891891892 [2023-11-26 10:46:55,732 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 545 transitions. [2023-11-26 10:46:55,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 545 transitions. [2023-11-26 10:46:55,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:55,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 545 transitions. [2023-11-26 10:46:55,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 21.8) internal successors, (545), 25 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,735 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 37.0) internal successors, (962), 26 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,735 INFO L175 Difference]: Start difference. First operand has 203 places, 172 transitions, 2764 flow. Second operand 25 states and 545 transitions. [2023-11-26 10:46:55,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 235 transitions, 3501 flow [2023-11-26 10:46:55,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 235 transitions, 3185 flow, removed 49 selfloop flow, removed 21 redundant places. [2023-11-26 10:46:55,830 INFO L231 Difference]: Finished difference. Result has 196 places, 162 transitions, 2547 flow [2023-11-26 10:46:55,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2547, PETRI_PLACES=196, PETRI_TRANSITIONS=162} [2023-11-26 10:46:55,831 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 157 predicate places. [2023-11-26 10:46:55,832 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 162 transitions, 2547 flow [2023-11-26 10:46:55,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.523809523809526) internal successors, (389), 21 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:55,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:55,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-26 10:46:56,038 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-26 10:46:56,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash -34893734, now seen corresponding path program 16 times [2023-11-26 10:46:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:56,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867522351] [2023-11-26 10:46:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867522351] [2023-11-26 10:46:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867522351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304456450] [2023-11-26 10:46:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:56,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:56,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b988cc-b148-4334-80cb-36be048dbbe2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 10:46:56,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:56,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:56,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:56,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:56,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:56,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304456450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:56,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:56,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:46:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992724147] [2023-11-26 10:46:56,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:46:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:46:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:56,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2023-11-26 10:46:56,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 162 transitions, 2547 flow. Second operand has 23 states, 23 states have (on average 18.47826086956522) internal successors, (425), 23 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:56,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:56,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2023-11-26 10:46:56,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand