./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu --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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:44,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:44,487 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:54:44,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:44,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:44,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:44,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:44,531 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:44,532 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:44,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:44,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:44,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:44,535 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:44,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:44,536 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:44,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:44,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:44,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:44,538 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:54:44,539 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:54:44,539 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:54:44,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:44,541 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:54:44,541 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:54:44,542 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:44,542 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:44,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:44,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:44,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:44,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:44,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:44,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:44,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:44,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:44,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:44,548 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:44,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:44,549 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:44,550 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_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-19 07:54:44,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:44,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:44,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:44,896 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:44,897 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:44,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:54:48,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:48,365 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:48,366 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:54:48,376 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/data/d45a5c14f/87c2e5ae6e6d46389551ee45624831e6/FLAG404fd24c7 [2023-11-19 07:54:48,397 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/data/d45a5c14f/87c2e5ae6e6d46389551ee45624831e6 [2023-11-19 07:54:48,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:48,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:48,418 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:48,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:48,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:48,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242c0fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48, skipping insertion in model container [2023-11-19 07:54:48,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:48,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:48,720 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:48,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:48,772 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:48,772 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:48,780 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:48,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48 WrapperNode [2023-11-19 07:54:48,781 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:48,782 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:48,782 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:48,783 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:48,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,834 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-19 07:54:48,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:48,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:48,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:48,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:48,845 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:48,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:48,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:48,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:48,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (1/1) ... [2023-11-19 07:54:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:48,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:48,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:48,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:48,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:54:48,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:54:48,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:54:48,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:54:48,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:54:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:54:48,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:48,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:48,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:48,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:48,952 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:49,110 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:49,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:49,353 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:49,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:49,407 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:54:49,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:49 BoogieIcfgContainer [2023-11-19 07:54:49,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:49,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:49,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:49,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:49,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:48" (1/3) ... [2023-11-19 07:54:49,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e259166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:49, skipping insertion in model container [2023-11-19 07:54:49,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:48" (2/3) ... [2023-11-19 07:54:49,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e259166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:49, skipping insertion in model container [2023-11-19 07:54:49,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:49" (3/3) ... [2023-11-19 07:54:49,421 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-19 07:54:49,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:49,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:54:49,442 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:49,510 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:54:49,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 97 transitions, 208 flow [2023-11-19 07:54:49,618 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-19 07:54:49,618 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:49,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 95 events. 6/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 07:54:49,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 97 transitions, 208 flow [2023-11-19 07:54:49,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 90 transitions, 192 flow [2023-11-19 07:54:49,634 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:49,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 90 transitions, 192 flow [2023-11-19 07:54:49,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 90 transitions, 192 flow [2023-11-19 07:54:49,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 90 transitions, 192 flow [2023-11-19 07:54:49,675 INFO L124 PetriNetUnfolderBase]: 6/90 cut-off events. [2023-11-19 07:54:49,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 6/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 07:54:49,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 664 [2023-11-19 07:54:53,789 INFO L134 LiptonReduction]: Checked pairs total: 759 [2023-11-19 07:54:53,789 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-19 07:54:53,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:53,812 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;@68200c8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:53,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 07:54:53,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:53,814 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:54:53,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:53,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:53,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:54:53,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:54:53,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 394, now seen corresponding path program 1 times [2023-11-19 07:54:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:53,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502983655] [2023-11-19 07:54:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502983655] [2023-11-19 07:54:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502983655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:54:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180416260] [2023-11-19 07:54:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:53,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:54:53,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:54:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:54:53,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-19 07:54:53,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:53,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:53,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-19 07:54:53,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:54,079 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-19 07:54:54,079 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:54:54,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 382 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-11-19 07:54:54,084 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-19 07:54:54,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-19 07:54:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:54:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:54:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-11-19 07:54:54,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-19 07:54:54,102 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-11-19 07:54:54,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-11-19 07:54:54,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:54,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-11-19 07:54:54,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,116 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,118 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 196 transitions. [2023-11-19 07:54:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-19 07:54:54,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:54,124 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-19 07:54:54,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-19 07:54:54,131 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:54:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-19 07:54:54,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:54,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:54,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:54,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:54:54,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash 389207, now seen corresponding path program 1 times [2023-11-19 07:54:54,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:54,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490946510] [2023-11-19 07:54:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:54,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:54,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:54,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490946510] [2023-11-19 07:54:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490946510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:54,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:54,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:54,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634084209] [2023-11-19 07:54:54,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:54,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:54,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:54,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 192 [2023-11-19 07:54:54,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:54,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 192 [2023-11-19 07:54:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:54,463 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-19 07:54:54,463 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:54,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 342 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-11-19 07:54:54,469 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-19 07:54:54,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-19 07:54:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-19 07:54:54,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2023-11-19 07:54:54,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-19 07:54:54,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-19 07:54:54,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:54,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-19 07:54:54,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,488 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 249 transitions. [2023-11-19 07:54:54,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-19 07:54:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:54,494 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-19 07:54:54,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-19 07:54:54,496 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:54:54,496 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-19 07:54:54,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:54,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:54,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:54:54,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash 389208, now seen corresponding path program 1 times [2023-11-19 07:54:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891838375] [2023-11-19 07:54:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891838375] [2023-11-19 07:54:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891838375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063842676] [2023-11-19 07:54:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:54,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:54,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:54,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:54:54,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:54,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:54:54,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:54,771 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-19 07:54:54,771 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:54,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 299 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-11-19 07:54:54,774 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-19 07:54:54,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-19 07:54:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-19 07:54:54,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496527777777778 [2023-11-19 07:54:54,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-19 07:54:54,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-19 07:54:54,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:54,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-19 07:54:54,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 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) [2023-11-19 07:54:54,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,785 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 259 transitions. [2023-11-19 07:54:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-19 07:54:54,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:54,788 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-19 07:54:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-19 07:54:54,790 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:54:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-19 07:54:54,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:54,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:54,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:54:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:54,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:54:54,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash 374035534, now seen corresponding path program 1 times [2023-11-19 07:54:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:54,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224054668] [2023-11-19 07:54:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:54,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:54,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224054668] [2023-11-19 07:54:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224054668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:54,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:54,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174759433] [2023-11-19 07:54:54,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:55,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 192 [2023-11-19 07:54:55,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 192 [2023-11-19 07:54:55,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,107 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-19 07:54:55,107 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 211 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-11-19 07:54:55,112 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-19 07:54:55,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-19 07:54:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-11-19 07:54:55,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357638888888889 [2023-11-19 07:54:55,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-11-19 07:54:55,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-11-19 07:54:55,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-11-19 07:54:55,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,121 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 251 transitions. [2023-11-19 07:54:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-19 07:54:55,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:55,122 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-19 07:54:55,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-19 07:54:55,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:54:55,125 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-19 07:54:55,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:54:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:55,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:54:55,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash 374035536, now seen corresponding path program 1 times [2023-11-19 07:54:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244010015] [2023-11-19 07:54:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244010015] [2023-11-19 07:54:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244010015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:55,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919107450] [2023-11-19 07:54:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:55,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 192 [2023-11-19 07:54:55,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 192 [2023-11-19 07:54:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,368 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-19 07:54:55,369 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:55,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-11-19 07:54:55,370 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-19 07:54:55,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-19 07:54:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-11-19 07:54:55,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-11-19 07:54:55,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-11-19 07:54:55,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-11-19 07:54:55,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-11-19 07:54:55,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,378 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 232 transitions. [2023-11-19 07:54:55,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-19 07:54:55,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:55,379 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-19 07:54:55,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-19 07:54:55,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:54:55,381 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-19 07:54:55,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:54:55,382 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)] === [2023-11-19 07:54:55,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1220517442, now seen corresponding path program 1 times [2023-11-19 07:54:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591771432] [2023-11-19 07:54:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591771432] [2023-11-19 07:54:55,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591771432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:55,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328240528] [2023-11-19 07:54:55,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:55,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:55,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:54:55,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 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) [2023-11-19 07:54:55,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:54:55,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,558 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-19 07:54:55,558 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:55,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 92 events. 51/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 200 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 193. Up to 73 conditions per place. [2023-11-19 07:54:55,560 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-19 07:54:55,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2023-11-19 07:54:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-11-19 07:54:55,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466145833333333 [2023-11-19 07:54:55,563 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-11-19 07:54:55,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-11-19 07:54:55,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-11-19 07:54:55,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,568 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,569 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 343 transitions. [2023-11-19 07:54:55,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 98 flow [2023-11-19 07:54:55,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:55,570 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-11-19 07:54:55,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-11-19 07:54:55,572 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-11-19 07:54:55,572 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-11-19 07:54:55,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 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) [2023-11-19 07:54:55,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:54:55,574 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)] === [2023-11-19 07:54:55,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -639164256, now seen corresponding path program 1 times [2023-11-19 07:54:55,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533774620] [2023-11-19 07:54:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533774620] [2023-11-19 07:54:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533774620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362424943] [2023-11-19 07:54:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:55,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2023-11-19 07:54:55,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:55,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2023-11-19 07:54:55,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:55,748 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-19 07:54:55,749 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-19 07:54:55,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 116 events. 65/116 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 292. Up to 92 conditions per place. [2023-11-19 07:54:55,751 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:54:55,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 127 flow [2023-11-19 07:54:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-11-19 07:54:55,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45703125 [2023-11-19 07:54:55,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-11-19 07:54:55,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-11-19 07:54:55,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:55,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-11-19 07:54:55,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,759 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 4 states and 351 transitions. [2023-11-19 07:54:55,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 127 flow [2023-11-19 07:54:55,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 117 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:55,762 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 60 flow [2023-11-19 07:54:55,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-19 07:54:55,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:54:55,763 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 60 flow [2023-11-19 07:54:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:54:55,764 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)] === [2023-11-19 07:54:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1880206581, now seen corresponding path program 1 times [2023-11-19 07:54:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810073880] [2023-11-19 07:54:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:55,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810073880] [2023-11-19 07:54:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810073880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628182753] [2023-11-19 07:54:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:55,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:55,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:56,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:56,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628182753] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:56,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:54:56,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-11-19 07:54:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912382324] [2023-11-19 07:54:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:56,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:56,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-19 07:54:56,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:56,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-19 07:54:56,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:56,535 INFO L124 PetriNetUnfolderBase]: 117/211 cut-off events. [2023-11-19 07:54:56,535 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-11-19 07:54:56,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 211 events. 117/211 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 645 event pairs, 19 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 584. Up to 77 conditions per place. [2023-11-19 07:54:56,538 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 32 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-11-19 07:54:56,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 228 flow [2023-11-19 07:54:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-11-19 07:54:56,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934895833333333 [2023-11-19 07:54:56,541 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-11-19 07:54:56,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-11-19 07:54:56,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:56,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-11-19 07:54:56,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,546 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,546 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 60 flow. Second operand 4 states and 379 transitions. [2023-11-19 07:54:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 228 flow [2023-11-19 07:54:56,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 214 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:56,550 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 98 flow [2023-11-19 07:54:56,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-11-19 07:54:56,555 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 07:54:56,555 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 98 flow [2023-11-19 07:54:56,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:56,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:56,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:56,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:54:56,771 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)] === [2023-11-19 07:54:56,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1875156275, now seen corresponding path program 2 times [2023-11-19 07:54:56,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367251877] [2023-11-19 07:54:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:56,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:56,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367251877] [2023-11-19 07:54:56,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367251877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531292315] [2023-11-19 07:54:56,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:56,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:56,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:56,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:56,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:56,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:57,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:54:57,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:57,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531292315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:57,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:54:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222700951] [2023-11-19 07:54:57,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:54:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:54:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:54:57,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:54:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 83.2) internal successors, (832), 10 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:54:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:57,441 INFO L124 PetriNetUnfolderBase]: 143/257 cut-off events. [2023-11-19 07:54:57,441 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-19 07:54:57,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 257 events. 143/257 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 806 event pairs, 35 based on Foata normal form. 16/273 useless extension candidates. Maximal degree in co-relation 820. Up to 190 conditions per place. [2023-11-19 07:54:57,445 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 32 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-19 07:54:57,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 259 flow [2023-11-19 07:54:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:54:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:54:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-11-19 07:54:57,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-19 07:54:57,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-11-19 07:54:57,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-11-19 07:54:57,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:57,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-11-19 07:54:57,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,455 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,455 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 98 flow. Second operand 5 states and 432 transitions. [2023-11-19 07:54:57,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 259 flow [2023-11-19 07:54:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:57,460 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 172 flow [2023-11-19 07:54:57,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-11-19 07:54:57,461 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-19 07:54:57,461 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 172 flow [2023-11-19 07:54:57,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.2) internal successors, (832), 10 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:57,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:57,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:57,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:57,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:54:57,677 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)] === [2023-11-19 07:54:57,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1968788221, now seen corresponding path program 3 times [2023-11-19 07:54:57,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:57,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3060405] [2023-11-19 07:54:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3060405] [2023-11-19 07:54:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3060405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712245691] [2023-11-19 07:54:57,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:57,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:57,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:57,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:58,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:54:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:58,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:54:58,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:58,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712245691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:58,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:58,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:54:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578459620] [2023-11-19 07:54:58,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:54:58,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:54:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:54:58,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:54:58,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 172 flow. Second operand has 16 states, 16 states have (on average 77.4375) internal successors, (1239), 16 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:58,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:54:58,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:59,161 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-19 07:54:59,161 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2023-11-19 07:54:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 372 events. 209/372 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1348 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 1400. Up to 127 conditions per place. [2023-11-19 07:54:59,166 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 65 selfloop transitions, 43 changer transitions 19/127 dead transitions. [2023-11-19 07:54:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 127 transitions, 890 flow [2023-11-19 07:54:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:54:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:54:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1918 transitions. [2023-11-19 07:54:59,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4162326388888889 [2023-11-19 07:54:59,176 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1918 transitions. [2023-11-19 07:54:59,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1918 transitions. [2023-11-19 07:54:59,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:59,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1918 transitions. [2023-11-19 07:54:59,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.91666666666667) internal successors, (1918), 24 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:59,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:59,201 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:59,201 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 172 flow. Second operand 24 states and 1918 transitions. [2023-11-19 07:54:59,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 127 transitions, 890 flow [2023-11-19 07:54:59,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 127 transitions, 872 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:59,213 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 527 flow [2023-11-19 07:54:59,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=527, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-19 07:54:59,215 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-19 07:54:59,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 527 flow [2023-11-19 07:54:59,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.4375) internal successors, (1239), 16 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:59,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:59,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:59,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:54:59,436 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)] === [2023-11-19 07:54:59,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1952067239, now seen corresponding path program 4 times [2023-11-19 07:54:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:59,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725169074] [2023-11-19 07:54:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:59,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725169074] [2023-11-19 07:54:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725169074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:59,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585660787] [2023-11-19 07:54:59,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:59,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:59,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:59,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:59,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:59,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:59,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585660787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:59,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:59,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:54:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151089183] [2023-11-19 07:54:59,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:54:59,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:54:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:00,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:00,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 527 flow. Second operand has 15 states, 15 states have (on average 77.4) internal successors, (1161), 15 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:00,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:00,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:00,540 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-11-19 07:55:00,540 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-11-19 07:55:00,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 435 events. 245/435 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1615 event pairs, 11 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 2140. Up to 157 conditions per place. [2023-11-19 07:55:00,547 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-11-19 07:55:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1308 flow [2023-11-19 07:55:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:55:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:55:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1518 transitions. [2023-11-19 07:55:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161184210526316 [2023-11-19 07:55:00,556 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1518 transitions. [2023-11-19 07:55:00,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1518 transitions. [2023-11-19 07:55:00,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:00,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1518 transitions. [2023-11-19 07:55:00,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 79.89473684210526) internal successors, (1518), 19 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 192.0) internal successors, (3840), 20 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,572 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 192.0) internal successors, (3840), 20 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,572 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 527 flow. Second operand 19 states and 1518 transitions. [2023-11-19 07:55:00,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1308 flow [2023-11-19 07:55:00,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1057 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-11-19 07:55:00,588 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 853 flow [2023-11-19 07:55:00,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=853, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2023-11-19 07:55:00,589 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-11-19 07:55:00,589 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 853 flow [2023-11-19 07:55:00,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.4) internal successors, (1161), 15 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:00,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:00,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:00,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:00,815 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)] === [2023-11-19 07:55:00,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash -657042407, now seen corresponding path program 5 times [2023-11-19 07:55:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:00,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100290688] [2023-11-19 07:55:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100290688] [2023-11-19 07:55:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100290688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327537845] [2023-11-19 07:55:00,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:55:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:00,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:01,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:01,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:55:01,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:01,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:01,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:01,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327537845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:01,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:01,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:55:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471502759] [2023-11-19 07:55:01,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:55:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:55:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:01,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:01,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 853 flow. Second operand has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:01,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:01,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:01,899 INFO L124 PetriNetUnfolderBase]: 338/578 cut-off events. [2023-11-19 07:55:01,899 INFO L125 PetriNetUnfolderBase]: For 5670/5670 co-relation queries the response was YES. [2023-11-19 07:55:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 578 events. 338/578 cut-off events. For 5670/5670 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2266 event pairs, 17 based on Foata normal form. 16/594 useless extension candidates. Maximal degree in co-relation 3228. Up to 262 conditions per place. [2023-11-19 07:55:01,911 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 82 selfloop transitions, 95 changer transitions 2/179 dead transitions. [2023-11-19 07:55:01,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1887 flow [2023-11-19 07:55:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:55:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:55:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1668 transitions. [2023-11-19 07:55:01,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-11-19 07:55:01,920 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1668 transitions. [2023-11-19 07:55:01,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1668 transitions. [2023-11-19 07:55:01,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:01,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1668 transitions. [2023-11-19 07:55:01,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.42857142857143) internal successors, (1668), 21 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 192.0) internal successors, (4224), 22 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,938 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 192.0) internal successors, (4224), 22 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,938 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 853 flow. Second operand 21 states and 1668 transitions. [2023-11-19 07:55:01,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1887 flow [2023-11-19 07:55:01,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1775 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:01,969 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1514 flow [2023-11-19 07:55:01,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1514, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2023-11-19 07:55:01,970 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2023-11-19 07:55:01,971 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1514 flow [2023-11-19 07:55:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:01,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:01,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:01,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:02,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:55:02,194 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)] === [2023-11-19 07:55:02,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:02,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1517106229, now seen corresponding path program 6 times [2023-11-19 07:55:02,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:02,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933908278] [2023-11-19 07:55:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:02,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933908278] [2023-11-19 07:55:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933908278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466370441] [2023-11-19 07:55:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:55:02,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:02,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:02,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:02,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:55:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:02,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:02,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:02,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:02,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466370441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:02,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:02,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:55:02,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552998404] [2023-11-19 07:55:02,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:02,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:55:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:55:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:02,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:02,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1514 flow. Second operand has 14 states, 14 states have (on average 77.07142857142857) internal successors, (1079), 14 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:02,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:02,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:03,309 INFO L124 PetriNetUnfolderBase]: 338/604 cut-off events. [2023-11-19 07:55:03,309 INFO L125 PetriNetUnfolderBase]: For 8985/8985 co-relation queries the response was YES. [2023-11-19 07:55:03,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 604 events. 338/604 cut-off events. For 8985/8985 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2529 event pairs, 11 based on Foata normal form. 30/634 useless extension candidates. Maximal degree in co-relation 3447. Up to 211 conditions per place. [2023-11-19 07:55:03,322 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 78 selfloop transitions, 101 changer transitions 3/182 dead transitions. [2023-11-19 07:55:03,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 2035 flow [2023-11-19 07:55:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:55:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:55:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1752 transitions. [2023-11-19 07:55:03,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2023-11-19 07:55:03,330 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1752 transitions. [2023-11-19 07:55:03,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1752 transitions. [2023-11-19 07:55:03,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:03,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1752 transitions. [2023-11-19 07:55:03,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.63636363636364) internal successors, (1752), 22 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:03,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 192.0) internal successors, (4416), 23 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:03,349 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 192.0) internal successors, (4416), 23 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:03,349 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1514 flow. Second operand 22 states and 1752 transitions. [2023-11-19 07:55:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 2035 flow [2023-11-19 07:55:03,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1812 flow, removed 92 selfloop flow, removed 9 redundant places. [2023-11-19 07:55:03,432 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1492 flow [2023-11-19 07:55:03,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1492, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2023-11-19 07:55:03,433 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2023-11-19 07:55:03,434 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1492 flow [2023-11-19 07:55:03,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.07142857142857) internal successors, (1079), 14 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:03,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:03,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:03,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:03,659 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)] === [2023-11-19 07:55:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -312748403, now seen corresponding path program 7 times [2023-11-19 07:55:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787284370] [2023-11-19 07:55:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:03,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:03,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787284370] [2023-11-19 07:55:03,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787284370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019117711] [2023-11-19 07:55:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:55:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:03,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:03,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:03,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:03,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:04,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019117711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:04,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:04,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:55:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976580085] [2023-11-19 07:55:04,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:04,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:55:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:04,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:55:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:55:04,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:04,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1492 flow. Second operand has 18 states, 18 states have (on average 77.27777777777777) internal successors, (1391), 18 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:04,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:04,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:04,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:05,276 INFO L124 PetriNetUnfolderBase]: 485/857 cut-off events. [2023-11-19 07:55:05,276 INFO L125 PetriNetUnfolderBase]: For 4303/4303 co-relation queries the response was YES. [2023-11-19 07:55:05,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 857 events. 485/857 cut-off events. For 4303/4303 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3938 event pairs, 13 based on Foata normal form. 10/867 useless extension candidates. Maximal degree in co-relation 4765. Up to 258 conditions per place. [2023-11-19 07:55:05,291 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 108 selfloop transitions, 149 changer transitions 0/257 dead transitions. [2023-11-19 07:55:05,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 257 transitions, 2968 flow [2023-11-19 07:55:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:55:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 07:55:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2298 transitions. [2023-11-19 07:55:05,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41271551724137934 [2023-11-19 07:55:05,298 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2298 transitions. [2023-11-19 07:55:05,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2298 transitions. [2023-11-19 07:55:05,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:05,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2298 transitions. [2023-11-19 07:55:05,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.24137931034483) internal successors, (2298), 29 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 192.0) internal successors, (5760), 30 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,319 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 192.0) internal successors, (5760), 30 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,319 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1492 flow. Second operand 29 states and 2298 transitions. [2023-11-19 07:55:05,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 257 transitions, 2968 flow [2023-11-19 07:55:05,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 2716 flow, removed 20 selfloop flow, removed 16 redundant places. [2023-11-19 07:55:05,358 INFO L231 Difference]: Finished difference. Result has 142 places, 205 transitions, 2473 flow [2023-11-19 07:55:05,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2473, PETRI_PLACES=142, PETRI_TRANSITIONS=205} [2023-11-19 07:55:05,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-11-19 07:55:05,360 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 205 transitions, 2473 flow [2023-11-19 07:55:05,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 77.27777777777777) internal successors, (1391), 18 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:05,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:05,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:05,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:05,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:55:05,590 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)] === [2023-11-19 07:55:05,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:05,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1929781353, now seen corresponding path program 8 times [2023-11-19 07:55:05,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:05,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995658072] [2023-11-19 07:55:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:05,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995658072] [2023-11-19 07:55:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995658072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725015285] [2023-11-19 07:55:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:05,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:05,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:05,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:55:05,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:05,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:05,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:06,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725015285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:06,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:55:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962093354] [2023-11-19 07:55:06,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:55:06,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:55:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:55:06,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:06,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 205 transitions, 2473 flow. Second operand has 18 states, 18 states have (on average 77.33333333333333) internal successors, (1392), 18 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:06,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:06,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:06,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:07,198 INFO L124 PetriNetUnfolderBase]: 569/1019 cut-off events. [2023-11-19 07:55:07,198 INFO L125 PetriNetUnfolderBase]: For 7613/7613 co-relation queries the response was YES. [2023-11-19 07:55:07,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6260 conditions, 1019 events. 569/1019 cut-off events. For 7613/7613 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5003 event pairs, 17 based on Foata normal form. 42/1061 useless extension candidates. Maximal degree in co-relation 6222. Up to 717 conditions per place. [2023-11-19 07:55:07,217 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 208 selfloop transitions, 78 changer transitions 1/287 dead transitions. [2023-11-19 07:55:07,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 287 transitions, 3689 flow [2023-11-19 07:55:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:55:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:55:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1916 transitions. [2023-11-19 07:55:07,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157986111111111 [2023-11-19 07:55:07,223 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1916 transitions. [2023-11-19 07:55:07,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1916 transitions. [2023-11-19 07:55:07,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:07,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1916 transitions. [2023-11-19 07:55:07,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.83333333333333) internal successors, (1916), 24 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,250 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,250 INFO L175 Difference]: Start difference. First operand has 142 places, 205 transitions, 2473 flow. Second operand 24 states and 1916 transitions. [2023-11-19 07:55:07,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 287 transitions, 3689 flow [2023-11-19 07:55:07,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 287 transitions, 3525 flow, removed 42 selfloop flow, removed 13 redundant places. [2023-11-19 07:55:07,331 INFO L231 Difference]: Finished difference. Result has 163 places, 237 transitions, 2977 flow [2023-11-19 07:55:07,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2977, PETRI_PLACES=163, PETRI_TRANSITIONS=237} [2023-11-19 07:55:07,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-11-19 07:55:07,332 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 237 transitions, 2977 flow [2023-11-19 07:55:07,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 77.33333333333333) internal successors, (1392), 18 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:07,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:07,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:07,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:07,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:55:07,547 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)] === [2023-11-19 07:55:07,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1300072481, now seen corresponding path program 9 times [2023-11-19 07:55:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:07,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48141417] [2023-11-19 07:55:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:07,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:07,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48141417] [2023-11-19 07:55:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48141417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:07,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502447874] [2023-11-19 07:55:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:07,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:07,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:07,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:55:07,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:55:07,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:07,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:55:07,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:08,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502447874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:08,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 07:55:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823656653] [2023-11-19 07:55:08,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:08,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:55:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:55:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:55:08,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:08,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 237 transitions, 2977 flow. Second operand has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:08,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:08,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:08,901 INFO L124 PetriNetUnfolderBase]: 563/993 cut-off events. [2023-11-19 07:55:08,902 INFO L125 PetriNetUnfolderBase]: For 9081/9081 co-relation queries the response was YES. [2023-11-19 07:55:08,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6596 conditions, 993 events. 563/993 cut-off events. For 9081/9081 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4787 event pairs, 17 based on Foata normal form. 6/999 useless extension candidates. Maximal degree in co-relation 6547. Up to 768 conditions per place. [2023-11-19 07:55:08,923 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 192 selfloop transitions, 69 changer transitions 4/265 dead transitions. [2023-11-19 07:55:08,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 3792 flow [2023-11-19 07:55:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:55:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:55:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1110 transitions. [2023-11-19 07:55:08,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41294642857142855 [2023-11-19 07:55:08,931 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1110 transitions. [2023-11-19 07:55:08,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1110 transitions. [2023-11-19 07:55:08,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:08,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1110 transitions. [2023-11-19 07:55:08,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.28571428571429) internal successors, (1110), 14 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,942 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,942 INFO L175 Difference]: Start difference. First operand has 163 places, 237 transitions, 2977 flow. Second operand 14 states and 1110 transitions. [2023-11-19 07:55:08,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 3792 flow [2023-11-19 07:55:09,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 265 transitions, 3519 flow, removed 108 selfloop flow, removed 9 redundant places. [2023-11-19 07:55:09,035 INFO L231 Difference]: Finished difference. Result has 169 places, 241 transitions, 2950 flow [2023-11-19 07:55:09,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2950, PETRI_PLACES=169, PETRI_TRANSITIONS=241} [2023-11-19 07:55:09,037 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-11-19 07:55:09,097 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 241 transitions, 2950 flow [2023-11-19 07:55:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:09,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:09,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:09,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:55:09,298 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)] === [2023-11-19 07:55:09,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash -945064936, now seen corresponding path program 10 times [2023-11-19 07:55:09,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:09,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412950131] [2023-11-19 07:55:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412950131] [2023-11-19 07:55:09,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412950131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579987378] [2023-11-19 07:55:09,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:09,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:09,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:09,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:55:09,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:09,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:09,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579987378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:09,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:09,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-19 07:55:09,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628348399] [2023-11-19 07:55:09,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:09,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:55:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:55:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:55:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-19 07:55:09,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 241 transitions, 2950 flow. Second operand has 10 states, 10 states have (on average 83.4) internal successors, (834), 10 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:09,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-19 07:55:09,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:10,453 INFO L124 PetriNetUnfolderBase]: 816/1431 cut-off events. [2023-11-19 07:55:10,453 INFO L125 PetriNetUnfolderBase]: For 12633/12633 co-relation queries the response was YES. [2023-11-19 07:55:10,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 1431 events. 816/1431 cut-off events. For 12633/12633 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7521 event pairs, 30 based on Foata normal form. 1/1432 useless extension candidates. Maximal degree in co-relation 9313. Up to 753 conditions per place. [2023-11-19 07:55:10,481 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 235 selfloop transitions, 96 changer transitions 45/376 dead transitions. [2023-11-19 07:55:10,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 376 transitions, 5262 flow [2023-11-19 07:55:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 535 transitions. [2023-11-19 07:55:10,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-11-19 07:55:10,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 535 transitions. [2023-11-19 07:55:10,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 535 transitions. [2023-11-19 07:55:10,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:10,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 535 transitions. [2023-11-19 07:55:10,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,489 INFO L175 Difference]: Start difference. First operand has 169 places, 241 transitions, 2950 flow. Second operand 6 states and 535 transitions. [2023-11-19 07:55:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 376 transitions, 5262 flow [2023-11-19 07:55:10,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 376 transitions, 5026 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-11-19 07:55:10,606 INFO L231 Difference]: Finished difference. Result has 169 places, 289 transitions, 3793 flow [2023-11-19 07:55:10,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3793, PETRI_PLACES=169, PETRI_TRANSITIONS=289} [2023-11-19 07:55:10,608 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-11-19 07:55:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 289 transitions, 3793 flow [2023-11-19 07:55:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.4) internal successors, (834), 10 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:10,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:10,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:10,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:55:10,815 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)] === [2023-11-19 07:55:10,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 899283160, now seen corresponding path program 11 times [2023-11-19 07:55:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:10,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485977162] [2023-11-19 07:55:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:10,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485977162] [2023-11-19 07:55:10,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485977162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015753903] [2023-11-19 07:55:10,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:55:10,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:10,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:11,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:55:11,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:55:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:11,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:55:11,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:11,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:11,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015753903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:11,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:11,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-19 07:55:11,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699330799] [2023-11-19 07:55:11,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:11,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 289 transitions, 3793 flow. Second operand has 13 states, 13 states have (on average 77.76923076923077) internal successors, (1011), 13 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:11,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:12,214 INFO L124 PetriNetUnfolderBase]: 787/1416 cut-off events. [2023-11-19 07:55:12,214 INFO L125 PetriNetUnfolderBase]: For 15693/15693 co-relation queries the response was YES. [2023-11-19 07:55:12,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9879 conditions, 1416 events. 787/1416 cut-off events. For 15693/15693 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7690 event pairs, 41 based on Foata normal form. 34/1450 useless extension candidates. Maximal degree in co-relation 9826. Up to 1067 conditions per place. [2023-11-19 07:55:12,243 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 259 selfloop transitions, 86 changer transitions 16/361 dead transitions. [2023-11-19 07:55:12,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 361 transitions, 5238 flow [2023-11-19 07:55:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:55:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:55:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1529 transitions. [2023-11-19 07:55:12,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41913377192982454 [2023-11-19 07:55:12,248 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1529 transitions. [2023-11-19 07:55:12,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1529 transitions. [2023-11-19 07:55:12,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:12,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1529 transitions. [2023-11-19 07:55:12,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 80.47368421052632) internal successors, (1529), 19 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 192.0) internal successors, (3840), 20 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,260 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 192.0) internal successors, (3840), 20 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,261 INFO L175 Difference]: Start difference. First operand has 169 places, 289 transitions, 3793 flow. Second operand 19 states and 1529 transitions. [2023-11-19 07:55:12,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 361 transitions, 5238 flow [2023-11-19 07:55:12,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 361 transitions, 5155 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:12,391 INFO L231 Difference]: Finished difference. Result has 191 places, 304 transitions, 4273 flow [2023-11-19 07:55:12,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4273, PETRI_PLACES=191, PETRI_TRANSITIONS=304} [2023-11-19 07:55:12,392 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2023-11-19 07:55:12,393 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 304 transitions, 4273 flow [2023-11-19 07:55:12,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 77.76923076923077) internal successors, (1011), 13 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:12,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:12,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:12,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:55:12,614 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)] === [2023-11-19 07:55:12,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 503042472, now seen corresponding path program 12 times [2023-11-19 07:55:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459000630] [2023-11-19 07:55:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:12,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459000630] [2023-11-19 07:55:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459000630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515025825] [2023-11-19 07:55:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:55:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:12,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:12,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:55:12,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:55:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:12,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:55:12,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:13,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:13,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515025825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:13,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:13,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-19 07:55:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984841977] [2023-11-19 07:55:13,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:13,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:55:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:55:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:55:13,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 304 transitions, 4273 flow. Second operand has 21 states, 21 states have (on average 77.19047619047619) internal successors, (1621), 21 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:13,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:14,990 INFO L124 PetriNetUnfolderBase]: 1026/1843 cut-off events. [2023-11-19 07:55:14,991 INFO L125 PetriNetUnfolderBase]: For 23492/23492 co-relation queries the response was YES. [2023-11-19 07:55:15,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 1843 events. 1026/1843 cut-off events. For 23492/23492 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10526 event pairs, 2 based on Foata normal form. 18/1861 useless extension candidates. Maximal degree in co-relation 13324. Up to 538 conditions per place. [2023-11-19 07:55:15,033 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 137 selfloop transitions, 345 changer transitions 34/516 dead transitions. [2023-11-19 07:55:15,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 516 transitions, 7732 flow [2023-11-19 07:55:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:55:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 07:55:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2709 transitions. [2023-11-19 07:55:15,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149816176470588 [2023-11-19 07:55:15,041 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2709 transitions. [2023-11-19 07:55:15,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2709 transitions. [2023-11-19 07:55:15,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:15,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2709 transitions. [2023-11-19 07:55:15,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.67647058823529) internal successors, (2709), 34 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 192.0) internal successors, (6720), 35 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 192.0) internal successors, (6720), 35 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,117 INFO L175 Difference]: Start difference. First operand has 191 places, 304 transitions, 4273 flow. Second operand 34 states and 2709 transitions. [2023-11-19 07:55:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 516 transitions, 7732 flow [2023-11-19 07:55:15,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 516 transitions, 7562 flow, removed 31 selfloop flow, removed 7 redundant places. [2023-11-19 07:55:15,296 INFO L231 Difference]: Finished difference. Result has 226 places, 407 transitions, 6697 flow [2023-11-19 07:55:15,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6697, PETRI_PLACES=226, PETRI_TRANSITIONS=407} [2023-11-19 07:55:15,298 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2023-11-19 07:55:15,298 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 407 transitions, 6697 flow [2023-11-19 07:55:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.19047619047619) internal successors, (1621), 21 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:15,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:15,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:15,520 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)] === [2023-11-19 07:55:15,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1592160706, now seen corresponding path program 13 times [2023-11-19 07:55:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:15,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299231561] [2023-11-19 07:55:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299231561] [2023-11-19 07:55:15,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299231561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:15,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922808120] [2023-11-19 07:55:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:55:15,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:15,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:55:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:15,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:15,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:15,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:16,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922808120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:16,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:16,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-19 07:55:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133019482] [2023-11-19 07:55:16,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:55:16,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:55:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:55:16,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:16,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 407 transitions, 6697 flow. Second operand has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:16,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:16,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:17,542 INFO L124 PetriNetUnfolderBase]: 1200/2045 cut-off events. [2023-11-19 07:55:17,543 INFO L125 PetriNetUnfolderBase]: For 35065/35065 co-relation queries the response was YES. [2023-11-19 07:55:17,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17582 conditions, 2045 events. 1200/2045 cut-off events. For 35065/35065 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11174 event pairs, 28 based on Foata normal form. 32/2077 useless extension candidates. Maximal degree in co-relation 17513. Up to 940 conditions per place. [2023-11-19 07:55:17,572 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 164 selfloop transitions, 386 changer transitions 5/555 dead transitions. [2023-11-19 07:55:17,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 555 transitions, 10192 flow [2023-11-19 07:55:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:55:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:55:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2141 transitions. [2023-11-19 07:55:17,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41300154320987653 [2023-11-19 07:55:17,579 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2141 transitions. [2023-11-19 07:55:17,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2141 transitions. [2023-11-19 07:55:17,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:17,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2141 transitions. [2023-11-19 07:55:17,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.29629629629629) internal successors, (2141), 27 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 192.0) internal successors, (5376), 28 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,596 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 192.0) internal successors, (5376), 28 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,596 INFO L175 Difference]: Start difference. First operand has 226 places, 407 transitions, 6697 flow. Second operand 27 states and 2141 transitions. [2023-11-19 07:55:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 555 transitions, 10192 flow [2023-11-19 07:55:17,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 555 transitions, 9763 flow, removed 186 selfloop flow, removed 9 redundant places. [2023-11-19 07:55:17,896 INFO L231 Difference]: Finished difference. Result has 244 places, 508 transitions, 9179 flow [2023-11-19 07:55:17,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9179, PETRI_PLACES=244, PETRI_TRANSITIONS=508} [2023-11-19 07:55:17,896 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2023-11-19 07:55:17,897 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 508 transitions, 9179 flow [2023-11-19 07:55:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:17,898 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:17,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:18,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:18,115 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)] === [2023-11-19 07:55:18,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1842742768, now seen corresponding path program 14 times [2023-11-19 07:55:18,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:18,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763251510] [2023-11-19 07:55:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:18,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:18,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:18,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763251510] [2023-11-19 07:55:18,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763251510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:18,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475055559] [2023-11-19 07:55:18,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:18,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:18,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:18,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:55:18,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:18,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:18,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:18,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:18,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475055559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:18,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:18,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-19 07:55:18,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681905141] [2023-11-19 07:55:18,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:18,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:55:18,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:55:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:55:18,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:18,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 508 transitions, 9179 flow. Second operand has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:18,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:18,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:20,379 INFO L124 PetriNetUnfolderBase]: 1215/2120 cut-off events. [2023-11-19 07:55:20,380 INFO L125 PetriNetUnfolderBase]: For 44898/44898 co-relation queries the response was YES. [2023-11-19 07:55:20,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18163 conditions, 2120 events. 1215/2120 cut-off events. For 44898/44898 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 11951 event pairs, 15 based on Foata normal form. 62/2182 useless extension candidates. Maximal degree in co-relation 18091. Up to 690 conditions per place. [2023-11-19 07:55:20,407 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 128 selfloop transitions, 442 changer transitions 5/575 dead transitions. [2023-11-19 07:55:20,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 575 transitions, 10759 flow [2023-11-19 07:55:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:55:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-19 07:55:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2543 transitions. [2023-11-19 07:55:20,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138997395833333 [2023-11-19 07:55:20,416 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2543 transitions. [2023-11-19 07:55:20,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2543 transitions. [2023-11-19 07:55:20,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:20,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2543 transitions. [2023-11-19 07:55:20,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.46875) internal successors, (2543), 32 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:20,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 192.0) internal successors, (6336), 33 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:20,433 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 192.0) internal successors, (6336), 33 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:20,433 INFO L175 Difference]: Start difference. First operand has 244 places, 508 transitions, 9179 flow. Second operand 32 states and 2543 transitions. [2023-11-19 07:55:20,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 575 transitions, 10759 flow [2023-11-19 07:55:20,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 575 transitions, 10175 flow, removed 232 selfloop flow, removed 12 redundant places. [2023-11-19 07:55:20,850 INFO L231 Difference]: Finished difference. Result has 262 places, 516 transitions, 9696 flow [2023-11-19 07:55:20,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9696, PETRI_PLACES=262, PETRI_TRANSITIONS=516} [2023-11-19 07:55:20,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 233 predicate places. [2023-11-19 07:55:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 516 transitions, 9696 flow [2023-11-19 07:55:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:20,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:20,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:20,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:21,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:21,075 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)] === [2023-11-19 07:55:21,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2068907698, now seen corresponding path program 15 times [2023-11-19 07:55:21,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:21,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100732409] [2023-11-19 07:55:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:21,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:21,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:21,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100732409] [2023-11-19 07:55:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100732409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494046613] [2023-11-19 07:55:21,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:21,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:21,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:21,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:21,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:55:21,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:55:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:21,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:21,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:21,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494046613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:21,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:21,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 07:55:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123770998] [2023-11-19 07:55:21,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:21,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:55:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:55:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:55:21,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:21,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 516 transitions, 9696 flow. Second operand has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:23,594 INFO L124 PetriNetUnfolderBase]: 1436/2501 cut-off events. [2023-11-19 07:55:23,595 INFO L125 PetriNetUnfolderBase]: For 34708/34708 co-relation queries the response was YES. [2023-11-19 07:55:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21771 conditions, 2501 events. 1436/2501 cut-off events. For 34708/34708 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14497 event pairs, 19 based on Foata normal form. 12/2513 useless extension candidates. Maximal degree in co-relation 21701. Up to 727 conditions per place. [2023-11-19 07:55:23,627 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 318 selfloop transitions, 409 changer transitions 0/727 dead transitions. [2023-11-19 07:55:23,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 727 transitions, 14186 flow [2023-11-19 07:55:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:55:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-19 07:55:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2855 transitions. [2023-11-19 07:55:23,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304976851851855 [2023-11-19 07:55:23,634 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2855 transitions. [2023-11-19 07:55:23,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2855 transitions. [2023-11-19 07:55:23,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:23,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2855 transitions. [2023-11-19 07:55:23,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.30555555555556) internal successors, (2855), 36 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 192.0) internal successors, (7104), 37 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,654 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 192.0) internal successors, (7104), 37 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:23,654 INFO L175 Difference]: Start difference. First operand has 262 places, 516 transitions, 9696 flow. Second operand 36 states and 2855 transitions. [2023-11-19 07:55:23,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 727 transitions, 14186 flow [2023-11-19 07:55:24,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 727 transitions, 13684 flow, removed 54 selfloop flow, removed 22 redundant places. [2023-11-19 07:55:24,106 INFO L231 Difference]: Finished difference. Result has 282 places, 638 transitions, 12873 flow [2023-11-19 07:55:24,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=9272, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12873, PETRI_PLACES=282, PETRI_TRANSITIONS=638} [2023-11-19 07:55:24,107 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 253 predicate places. [2023-11-19 07:55:24,108 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 638 transitions, 12873 flow [2023-11-19 07:55:24,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:24,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:24,108 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:24,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 07:55:24,309 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)] === [2023-11-19 07:55:24,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1407781758, now seen corresponding path program 16 times [2023-11-19 07:55:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287067594] [2023-11-19 07:55:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:24,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287067594] [2023-11-19 07:55:24,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287067594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:24,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036595555] [2023-11-19 07:55:24,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:24,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:24,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:24,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:24,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:55:24,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:24,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:24,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036595555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:24,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:24,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 07:55:24,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456097936] [2023-11-19 07:55:24,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:24,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:55:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:55:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:55:25,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:25,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 638 transitions, 12873 flow. Second operand has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:25,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:25,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:25,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:26,720 INFO L124 PetriNetUnfolderBase]: 1510/2651 cut-off events. [2023-11-19 07:55:26,720 INFO L125 PetriNetUnfolderBase]: For 41303/41303 co-relation queries the response was YES. [2023-11-19 07:55:26,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24338 conditions, 2651 events. 1510/2651 cut-off events. For 41303/41303 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15711 event pairs, 13 based on Foata normal form. 26/2677 useless extension candidates. Maximal degree in co-relation 24261. Up to 701 conditions per place. [2023-11-19 07:55:26,758 INFO L140 encePairwiseOnDemand]: 185/192 looper letters, 328 selfloop transitions, 420 changer transitions 12/760 dead transitions. [2023-11-19 07:55:26,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 760 transitions, 15798 flow [2023-11-19 07:55:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:55:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 07:55:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3091 transitions. [2023-11-19 07:55:26,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127938034188034 [2023-11-19 07:55:26,765 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3091 transitions. [2023-11-19 07:55:26,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3091 transitions. [2023-11-19 07:55:26,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:26,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3091 transitions. [2023-11-19 07:55:26,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 79.25641025641026) internal successors, (3091), 39 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:26,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 192.0) internal successors, (7680), 40 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:26,782 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 192.0) internal successors, (7680), 40 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:26,783 INFO L175 Difference]: Start difference. First operand has 282 places, 638 transitions, 12873 flow. Second operand 39 states and 3091 transitions. [2023-11-19 07:55:26,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 760 transitions, 15798 flow [2023-11-19 07:55:27,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 760 transitions, 15290 flow, removed 115 selfloop flow, removed 14 redundant places. [2023-11-19 07:55:27,325 INFO L231 Difference]: Finished difference. Result has 313 places, 659 transitions, 13838 flow [2023-11-19 07:55:27,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=12361, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13838, PETRI_PLACES=313, PETRI_TRANSITIONS=659} [2023-11-19 07:55:27,326 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-11-19 07:55:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 659 transitions, 13838 flow [2023-11-19 07:55:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:27,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:27,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-19 07:55:27,548 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)] === [2023-11-19 07:55:27,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash -196850450, now seen corresponding path program 17 times [2023-11-19 07:55:27,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481660502] [2023-11-19 07:55:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:27,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481660502] [2023-11-19 07:55:27,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481660502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325446601] [2023-11-19 07:55:27,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:55:27,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:27,748 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:27,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:55:27,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:55:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:27,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:55:27,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:27,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325446601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:28,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 07:55:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919713619] [2023-11-19 07:55:28,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:55:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:55:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:55:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:28,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 659 transitions, 13838 flow. Second operand has 23 states, 23 states have (on average 77.0) internal successors, (1771), 23 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:28,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:28,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:28,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:30,751 INFO L124 PetriNetUnfolderBase]: 1821/3208 cut-off events. [2023-11-19 07:55:30,751 INFO L125 PetriNetUnfolderBase]: For 50853/50853 co-relation queries the response was YES. [2023-11-19 07:55:30,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29974 conditions, 3208 events. 1821/3208 cut-off events. For 50853/50853 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19911 event pairs, 21 based on Foata normal form. 12/3220 useless extension candidates. Maximal degree in co-relation 29893. Up to 844 conditions per place. [2023-11-19 07:55:30,793 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 261 selfloop transitions, 637 changer transitions 0/898 dead transitions. [2023-11-19 07:55:30,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 898 transitions, 19251 flow [2023-11-19 07:55:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-19 07:55:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-19 07:55:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3565 transitions. [2023-11-19 07:55:30,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41261574074074076 [2023-11-19 07:55:30,801 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3565 transitions. [2023-11-19 07:55:30,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3565 transitions. [2023-11-19 07:55:30,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:30,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3565 transitions. [2023-11-19 07:55:30,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 79.22222222222223) internal successors, (3565), 45 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 192.0) internal successors, (8832), 46 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,820 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 192.0) internal successors, (8832), 46 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,821 INFO L175 Difference]: Start difference. First operand has 313 places, 659 transitions, 13838 flow. Second operand 45 states and 3565 transitions. [2023-11-19 07:55:30,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 898 transitions, 19251 flow [2023-11-19 07:55:31,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 898 transitions, 18769 flow, removed 84 selfloop flow, removed 20 redundant places. [2023-11-19 07:55:31,444 INFO L231 Difference]: Finished difference. Result has 345 places, 803 transitions, 18421 flow [2023-11-19 07:55:31,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=13455, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=18421, PETRI_PLACES=345, PETRI_TRANSITIONS=803} [2023-11-19 07:55:31,446 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 316 predicate places. [2023-11-19 07:55:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 803 transitions, 18421 flow [2023-11-19 07:55:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.0) internal successors, (1771), 23 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:31,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:31,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:31,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:31,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:55:31,647 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)] === [2023-11-19 07:55:31,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash 856368798, now seen corresponding path program 18 times [2023-11-19 07:55:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:31,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763949709] [2023-11-19 07:55:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:31,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:31,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763949709] [2023-11-19 07:55:31,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763949709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:31,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773961542] [2023-11-19 07:55:31,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:55:31,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:31,834 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:31,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2273910-d9fd-4537-9151-cf9f728ab4d2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:55:31,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:55:31,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:31,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:31,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:32,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773961542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:32,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:32,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 07:55:32,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957246193] [2023-11-19 07:55:32,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:32,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:55:32,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:55:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:55:32,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 07:55:32,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 803 transitions, 18421 flow. Second operand has 23 states, 23 states have (on average 77.1304347826087) internal successors, (1774), 23 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:32,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 07:55:32,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand