./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.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_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/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_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/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_ef79c54d-0cf5-4904-b523-675fff65cea0/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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:09,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:09,412 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:09,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:09,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:09,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:09,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:09,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:09,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:09,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:09,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:09,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:09,481 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:09,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:09,483 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:09,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:09,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:09,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:09,485 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:09,486 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:09,486 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:09,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:09,487 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:09,488 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:09,488 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:09,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:09,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:09,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:09,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:09,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:09,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:09,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:09,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:09,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:09,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:09,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:09,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:09,494 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:09,494 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_ef79c54d-0cf5-4904-b523-675fff65cea0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-19 07:50:09,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:09,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:09,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:09,781 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:09,781 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:09,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-19 07:50:12,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:13,224 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:13,225 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-19 07:50:13,236 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/data/b75c0de3b/b9fc33b85bf24afd80820e5c4adf8079/FLAG42f18e746 [2023-11-19 07:50:13,255 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/data/b75c0de3b/b9fc33b85bf24afd80820e5c4adf8079 [2023-11-19 07:50:13,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:13,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:13,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:13,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:13,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:13,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5685548f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13, skipping insertion in model container [2023-11-19 07:50:13,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,304 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:13,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:13,558 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:13,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:13,606 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:13,606 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:13,614 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:13,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13 WrapperNode [2023-11-19 07:50:13,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:13,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:13,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:13,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:13,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,675 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2023-11-19 07:50:13,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:13,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:13,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:13,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:13,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:13,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:13,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:13,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:13,723 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (1/1) ... [2023-11-19 07:50:13,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:13,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:13,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:50:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:50:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:50:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:50:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:50:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:50:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:13,837 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 07:50:13,978 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:13,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:14,217 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:14,261 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:14,261 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:50:14,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:14 BoogieIcfgContainer [2023-11-19 07:50:14,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:14,306 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:14,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:14,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:14,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:13" (1/3) ... [2023-11-19 07:50:14,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f67750f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:14, skipping insertion in model container [2023-11-19 07:50:14,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:13" (2/3) ... [2023-11-19 07:50:14,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f67750f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:14, skipping insertion in model container [2023-11-19 07:50:14,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:14" (3/3) ... [2023-11-19 07:50:14,319 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-19 07:50:14,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:14,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:50:14,373 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:14,449 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:50:14,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 222 flow [2023-11-19 07:50:14,545 INFO L124 PetriNetUnfolderBase]: 6/102 cut-off events. [2023-11-19 07:50:14,546 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:14,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 6/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-11-19 07:50:14,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 222 flow [2023-11-19 07:50:14,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 97 transitions, 206 flow [2023-11-19 07:50:14,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:14,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 97 transitions, 206 flow [2023-11-19 07:50:14,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 97 transitions, 206 flow [2023-11-19 07:50:14,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 97 transitions, 206 flow [2023-11-19 07:50:14,638 INFO L124 PetriNetUnfolderBase]: 6/97 cut-off events. [2023-11-19 07:50:14,642 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:14,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-11-19 07:50:14,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2023-11-19 07:50:18,177 INFO L134 LiptonReduction]: Checked pairs total: 876 [2023-11-19 07:50:18,178 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-19 07:50:18,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:18,202 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;@537b3e8f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:18,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 07:50:18,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:18,205 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:18,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:18,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:50:18,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 412, now seen corresponding path program 1 times [2023-11-19 07:50:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531665903] [2023-11-19 07:50:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,319 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 07:50:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531665903] [2023-11-19 07:50:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531665903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:50:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133042518] [2023-11-19 07:50:18,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:18,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:18,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2023-11-19 07:50:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:18,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2023-11-19 07:50:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:18,441 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-19 07:50:18,441 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-19 07:50:18,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 375 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 07:50:18,445 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-19 07:50:18,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-19 07:50:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 212 transitions. [2023-11-19 07:50:18,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2023-11-19 07:50:18,462 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 212 transitions. [2023-11-19 07:50:18,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 212 transitions. [2023-11-19 07:50:18,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:18,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 212 transitions. [2023-11-19 07:50:18,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.0) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 07:50:18,477 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 07:50:18,479 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 212 transitions. [2023-11-19 07:50:18,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-19 07:50:18,482 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 07:50:18,484 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-19 07:50:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, 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 07:50:18,490 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:50:18,490 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-19 07:50:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:18,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:18,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:18,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 405936, now seen corresponding path program 1 times [2023-11-19 07:50:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141175076] [2023-11-19 07:50:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,748 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 07:50:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141175076] [2023-11-19 07:50:18,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141175076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671123923] [2023-11-19 07:50:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:18,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:18,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-11-19 07:50:18,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 07:50:18,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:18,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-11-19 07:50:18,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:18,879 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-19 07:50:18,879 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:18,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 333 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 07:50:18,881 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-19 07:50:18,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-19 07:50:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-19 07:50:18,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2023-11-19 07:50:18,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-19 07:50:18,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-19 07:50:18,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:18,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-19 07:50:18,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:18,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:18,891 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 285 transitions. [2023-11-19 07:50:18,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-19 07:50:18,892 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 07:50:18,892 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-19 07:50:18,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, 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 07:50:18,894 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 07:50:18,894 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-19 07:50:18,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 07:50:18,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:18,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:18,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:18,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 405937, now seen corresponding path program 1 times [2023-11-19 07:50:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400498626] [2023-11-19 07:50:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,970 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 07:50:18,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400498626] [2023-11-19 07:50:18,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400498626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:18,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393131245] [2023-11-19 07:50:18,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:19,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:50:19,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:50:19,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:19,107 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-19 07:50:19,107 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:19,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 289 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 07:50:19,109 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-19 07:50:19,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-19 07:50:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-11-19 07:50:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065040650406506 [2023-11-19 07:50:19,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-11-19 07:50:19,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-11-19 07:50:19,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:19,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-11-19 07:50:19,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 07:50:19,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,117 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 271 transitions. [2023-11-19 07:50:19,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-19 07:50:19,118 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 07:50:19,119 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-19 07:50:19,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, 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 07:50:19,120 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:19,120 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-19 07:50:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:19,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:19,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:19,122 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 07:50:19,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 390112505, now seen corresponding path program 1 times [2023-11-19 07:50:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115146849] [2023-11-19 07:50:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:19,306 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 07:50:19,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115146849] [2023-11-19 07:50:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115146849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:19,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533863258] [2023-11-19 07:50:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:19,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-11-19 07:50:19,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-11-19 07:50:19,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:19,429 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-19 07:50:19,430 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:19,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 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 07:50:19,433 INFO L140 encePairwiseOnDemand]: 203/205 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-19 07:50:19,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-19 07:50:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-11-19 07:50:19,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2023-11-19 07:50:19,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-11-19 07:50:19,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-11-19 07:50:19,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:19,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-11-19 07:50:19,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,442 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 275 transitions. [2023-11-19 07:50:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-19 07:50:19,443 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 07:50:19,445 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-19 07:50:19,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, 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 07:50:19,447 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:19,447 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-19 07:50:19,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:19,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:19,449 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 07:50:19,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 390112504, now seen corresponding path program 1 times [2023-11-19 07:50:19,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668398835] [2023-11-19 07:50:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:19,563 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 07:50:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668398835] [2023-11-19 07:50:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668398835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:19,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:19,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:19,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188966883] [2023-11-19 07:50:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:19,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:19,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 205 [2023-11-19 07:50:19,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 07:50:19,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 205 [2023-11-19 07:50:19,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:19,684 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-19 07:50:19,684 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:19,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 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 07:50:19,685 INFO L140 encePairwiseOnDemand]: 203/205 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-19 07:50:19,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-19 07:50:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-19 07:50:19,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416260162601626 [2023-11-19 07:50:19,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-19 07:50:19,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-19 07:50:19,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:19,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-19 07:50:19,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 07:50:19,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,691 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 256 transitions. [2023-11-19 07:50:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-19 07:50:19,692 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 07:50:19,692 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-19 07:50:19,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, 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 07:50:19,695 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 07:50:19,695 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-19 07:50:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 07:50:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:19,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:19,698 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 07:50:19,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 156313351, now seen corresponding path program 1 times [2023-11-19 07:50:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402954860] [2023-11-19 07:50:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:19,832 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 07:50:19,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:19,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402954860] [2023-11-19 07:50:19,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402954860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:19,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636624542] [2023-11-19 07:50:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:19,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 205 [2023-11-19 07:50:19,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 205 [2023-11-19 07:50:19,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:19,897 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-19 07:50:19,898 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:19,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 116 events. 60/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 315 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 242. Up to 61 conditions per place. [2023-11-19 07:50:19,899 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-19 07:50:19,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 112 flow [2023-11-19 07:50:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-19 07:50:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926829268292683 [2023-11-19 07:50:19,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-19 07:50:19,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-19 07:50:19,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:19,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-19 07:50:19,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 07:50:19,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:50:19,907 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 303 transitions. [2023-11-19 07:50:19,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 112 flow [2023-11-19 07:50:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:19,909 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-11-19 07:50:19,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-11-19 07:50:19,912 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-19 07:50:19,915 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-11-19 07:50:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:19,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:19,917 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 07:50:19,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1610732411, now seen corresponding path program 1 times [2023-11-19 07:50:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481098809] [2023-11-19 07:50:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:20,094 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 07:50:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481098809] [2023-11-19 07:50:20,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481098809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:20,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:20,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633308818] [2023-11-19 07:50:20,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:20,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:50:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:50:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:20,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:20,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 07:50:20,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:20,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:20,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:20,219 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-19 07:50:20,220 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:50:20,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 342 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 298. Up to 106 conditions per place. [2023-11-19 07:50:20,221 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-19 07:50:20,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 136 flow [2023-11-19 07:50:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 439 transitions. [2023-11-19 07:50:20,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42829268292682926 [2023-11-19 07:50:20,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 439 transitions. [2023-11-19 07:50:20,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 439 transitions. [2023-11-19 07:50:20,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:20,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 439 transitions. [2023-11-19 07:50:20,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 07:50:20,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:20,229 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:20,230 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 5 states and 439 transitions. [2023-11-19 07:50:20,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 136 flow [2023-11-19 07:50:20,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:20,232 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 79 flow [2023-11-19 07:50:20,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=5, PETRI_FLOW=79, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-11-19 07:50:20,232 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 07:50:20,233 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 79 flow [2023-11-19 07:50:20,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 07:50:20,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:20,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:20,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:50:20,234 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 07:50:20,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1695850493, now seen corresponding path program 2 times [2023-11-19 07:50:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:20,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666144154] [2023-11-19 07:50:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666144154] [2023-11-19 07:50:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666144154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231497353] [2023-11-19 07:50:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:20,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:20,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:20,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:20,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:20,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231497353] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:20,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:20,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-19 07:50:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251289294] [2023-11-19 07:50:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:20,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:20,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:20,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-11-19 07:50:20,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 07:50:20,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:20,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-11-19 07:50:20,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:20,772 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-19 07:50:20,772 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-19 07:50:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 105 events. 56/105 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 266 event pairs, 10 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 333. Up to 62 conditions per place. [2023-11-19 07:50:20,774 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-19 07:50:20,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 175 flow [2023-11-19 07:50:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2023-11-19 07:50:20,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2023-11-19 07:50:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 372 transitions. [2023-11-19 07:50:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 372 transitions. [2023-11-19 07:50:20,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:20,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 372 transitions. [2023-11-19 07:50:20,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:20,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 07:50:20,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 07:50:20,781 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 79 flow. Second operand 4 states and 372 transitions. [2023-11-19 07:50:20,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 175 flow [2023-11-19 07:50:20,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 159 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:20,784 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2023-11-19 07:50:20,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-11-19 07:50:20,785 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-11-19 07:50:20,785 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2023-11-19 07:50:20,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 07:50:20,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:20,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:20,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:50:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,010 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 07:50:21,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -185785049, now seen corresponding path program 3 times [2023-11-19 07:50:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27524753] [2023-11-19 07:50:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:21,152 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 07:50:21,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:21,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27524753] [2023-11-19 07:50:21,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27524753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:21,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398762263] [2023-11-19 07:50:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:50:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:50:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:21,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:21,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 07:50:21,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:21,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:21,286 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2023-11-19 07:50:21,286 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-19 07:50:21,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 126 events. 69/126 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 19 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 425. Up to 89 conditions per place. [2023-11-19 07:50:21,288 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 22 selfloop transitions, 8 changer transitions 2/32 dead transitions. [2023-11-19 07:50:21,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 206 flow [2023-11-19 07:50:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2023-11-19 07:50:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273170731707317 [2023-11-19 07:50:21,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2023-11-19 07:50:21,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2023-11-19 07:50:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2023-11-19 07:50:21,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 07:50:21,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:21,297 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:21,297 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 438 transitions. [2023-11-19 07:50:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 206 flow [2023-11-19 07:50:21,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 201 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:21,301 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 148 flow [2023-11-19 07:50:21,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-11-19 07:50:21,302 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-19 07:50:21,302 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 148 flow [2023-11-19 07:50:21,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 07:50:21,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:21,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:21,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:50:21,303 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 07:50:21,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash 577351475, now seen corresponding path program 4 times [2023-11-19 07:50:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440641436] [2023-11-19 07:50:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:21,415 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 07:50:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440641436] [2023-11-19 07:50:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440641436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:21,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027499693] [2023-11-19 07:50:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:50:21,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:50:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:21,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 205 [2023-11-19 07:50:21,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:21,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:21,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 205 [2023-11-19 07:50:21,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:21,576 INFO L124 PetriNetUnfolderBase]: 66/129 cut-off events. [2023-11-19 07:50:21,576 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-11-19 07:50:21,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 129 events. 66/129 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 21 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 511. Up to 75 conditions per place. [2023-11-19 07:50:21,578 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-11-19 07:50:21,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 265 flow [2023-11-19 07:50:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2023-11-19 07:50:21,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370731707317073 [2023-11-19 07:50:21,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2023-11-19 07:50:21,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2023-11-19 07:50:21,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:21,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2023-11-19 07:50:21,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 07:50:21,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:21,587 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:21,587 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 148 flow. Second operand 5 states and 448 transitions. [2023-11-19 07:50:21,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 265 flow [2023-11-19 07:50:21,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 251 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:21,592 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 153 flow [2023-11-19 07:50:21,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2023-11-19 07:50:21,593 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-11-19 07:50:21,593 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 153 flow [2023-11-19 07:50:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:21,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:21,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:21,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:50:21,595 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 07:50:21,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 656268385, now seen corresponding path program 5 times [2023-11-19 07:50:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878250036] [2023-11-19 07:50:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:21,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878250036] [2023-11-19 07:50:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878250036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199794235] [2023-11-19 07:50:21,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:50:21,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:21,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:21,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:21,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:21,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:21,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:21,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:21,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199794235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:21,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:21,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-19 07:50:21,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186115699] [2023-11-19 07:50:21,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:22,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:22,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 153 flow. Second operand has 7 states, 7 states have (on average 85.42857142857143) internal successors, (598), 7 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 07:50:22,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:22,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:22,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:22,220 INFO L124 PetriNetUnfolderBase]: 84/161 cut-off events. [2023-11-19 07:50:22,220 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2023-11-19 07:50:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 161 events. 84/161 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 469 event pairs, 28 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 653. Up to 116 conditions per place. [2023-11-19 07:50:22,223 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 33 selfloop transitions, 15 changer transitions 1/49 dead transitions. [2023-11-19 07:50:22,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 368 flow [2023-11-19 07:50:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:50:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:50:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 701 transitions. [2023-11-19 07:50:22,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274390243902439 [2023-11-19 07:50:22,227 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 701 transitions. [2023-11-19 07:50:22,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 701 transitions. [2023-11-19 07:50:22,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:22,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 701 transitions. [2023-11-19 07:50:22,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.625) internal successors, (701), 8 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 07:50:22,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 07:50:22,235 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 07:50:22,235 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 153 flow. Second operand 8 states and 701 transitions. [2023-11-19 07:50:22,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 368 flow [2023-11-19 07:50:22,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 346 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:22,239 INFO L231 Difference]: Finished difference. Result has 46 places, 31 transitions, 243 flow [2023-11-19 07:50:22,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=46, PETRI_TRANSITIONS=31} [2023-11-19 07:50:22,240 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-11-19 07:50:22,241 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 31 transitions, 243 flow [2023-11-19 07:50:22,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.42857142857143) internal successors, (598), 7 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 07:50:22,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:22,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:22,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:50:22,457 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 07:50:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1072959855, now seen corresponding path program 6 times [2023-11-19 07:50:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598251261] [2023-11-19 07:50:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:22,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598251261] [2023-11-19 07:50:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598251261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554019113] [2023-11-19 07:50:22,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:50:22,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:22,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:22,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:22,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:50:22,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:22,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:22,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:22,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554019113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:22,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:50:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210434723] [2023-11-19 07:50:22,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:50:22,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:50:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:22,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:22,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 31 transitions, 243 flow. Second operand has 8 states, 8 states have (on average 84.375) internal successors, (675), 8 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 07:50:22,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:22,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:22,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:22,911 INFO L124 PetriNetUnfolderBase]: 77/144 cut-off events. [2023-11-19 07:50:22,911 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2023-11-19 07:50:22,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 144 events. 77/144 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 379 event pairs, 21 based on Foata normal form. 6/150 useless extension candidates. Maximal degree in co-relation 659. Up to 91 conditions per place. [2023-11-19 07:50:22,914 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 26 selfloop transitions, 13 changer transitions 0/39 dead transitions. [2023-11-19 07:50:22,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 341 flow [2023-11-19 07:50:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2023-11-19 07:50:22,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302439024390244 [2023-11-19 07:50:22,917 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2023-11-19 07:50:22,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2023-11-19 07:50:22,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:22,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2023-11-19 07:50:22,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 07:50:22,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:22,923 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:22,924 INFO L175 Difference]: Start difference. First operand has 46 places, 31 transitions, 243 flow. Second operand 5 states and 441 transitions. [2023-11-19 07:50:22,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 341 flow [2023-11-19 07:50:22,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 314 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:22,930 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 230 flow [2023-11-19 07:50:22,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2023-11-19 07:50:22,932 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-11-19 07:50:22,932 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 230 flow [2023-11-19 07:50:22,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 84.375) internal successors, (675), 8 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 07:50:22,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:22,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:23,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:50:23,153 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 07:50:23,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:23,153 INFO L85 PathProgramCache]: Analyzing trace with hash 233960458, now seen corresponding path program 1 times [2023-11-19 07:50:23,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:23,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875295075] [2023-11-19 07:50:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:23,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:23,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:23,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875295075] [2023-11-19 07:50:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875295075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:23,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517583160] [2023-11-19 07:50:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:23,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:23,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:23,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:23,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:50:23,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:23,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517583160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:23,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:23,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-11-19 07:50:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896707139] [2023-11-19 07:50:23,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:23,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-11-19 07:50:23,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 07:50:23,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:23,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-11-19 07:50:23,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:23,654 INFO L124 PetriNetUnfolderBase]: 142/268 cut-off events. [2023-11-19 07:50:23,655 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2023-11-19 07:50:23,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 268 events. 142/268 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 950 event pairs, 22 based on Foata normal form. 7/275 useless extension candidates. Maximal degree in co-relation 1205. Up to 130 conditions per place. [2023-11-19 07:50:23,659 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 40 selfloop transitions, 11 changer transitions 6/57 dead transitions. [2023-11-19 07:50:23,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 504 flow [2023-11-19 07:50:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:50:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-11-19 07:50:23,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4865853658536585 [2023-11-19 07:50:23,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-11-19 07:50:23,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-11-19 07:50:23,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:23,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-11-19 07:50:23,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 07:50:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 07:50:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 07:50:23,670 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 230 flow. Second operand 4 states and 399 transitions. [2023-11-19 07:50:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 504 flow [2023-11-19 07:50:23,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:23,676 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 321 flow [2023-11-19 07:50:23,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-11-19 07:50:23,677 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-11-19 07:50:23,678 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 321 flow [2023-11-19 07:50:23,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 07:50:23,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:23,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:23,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:23,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:50:23,901 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 07:50:23,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1711905402, now seen corresponding path program 2 times [2023-11-19 07:50:23,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:23,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606792878] [2023-11-19 07:50:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:24,174 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 07:50:24,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:24,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606792878] [2023-11-19 07:50:24,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606792878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132352320] [2023-11-19 07:50:24,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:24,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:24,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:24,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:24,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:24,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:24,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:24,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:24,367 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 07:50:24,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:24,462 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 07:50:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132352320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:24,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:24,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:50:24,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566012401] [2023-11-19 07:50:24,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:50:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:50:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:50:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 321 flow. Second operand has 14 states, 14 states have (on average 84.21428571428571) internal successors, (1179), 14 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states 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 07:50:24,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:24,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:25,139 INFO L124 PetriNetUnfolderBase]: 260/444 cut-off events. [2023-11-19 07:50:25,140 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2023-11-19 07:50:25,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 444 events. 260/444 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1671 event pairs, 24 based on Foata normal form. 14/458 useless extension candidates. Maximal degree in co-relation 2183. Up to 183 conditions per place. [2023-11-19 07:50:25,147 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 55 selfloop transitions, 61 changer transitions 11/127 dead transitions. [2023-11-19 07:50:25,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 127 transitions, 1240 flow [2023-11-19 07:50:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:50:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:50:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1652 transitions. [2023-11-19 07:50:25,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241335044929397 [2023-11-19 07:50:25,155 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1652 transitions. [2023-11-19 07:50:25,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1652 transitions. [2023-11-19 07:50:25,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:25,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1652 transitions. [2023-11-19 07:50:25,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 86.94736842105263) internal successors, (1652), 19 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 07:50:25,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states 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 07:50:25,170 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states 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 07:50:25,170 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 321 flow. Second operand 19 states and 1652 transitions. [2023-11-19 07:50:25,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 127 transitions, 1240 flow [2023-11-19 07:50:25,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 127 transitions, 1204 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:25,181 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 929 flow [2023-11-19 07:50:25,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=929, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-11-19 07:50:25,182 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-11-19 07:50:25,182 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 929 flow [2023-11-19 07:50:25,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 84.21428571428571) internal successors, (1179), 14 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states 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 07:50:25,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:25,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:25,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:50:25,397 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 07:50:25,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1562176654, now seen corresponding path program 3 times [2023-11-19 07:50:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255988796] [2023-11-19 07:50:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:25,587 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 07:50:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255988796] [2023-11-19 07:50:25,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255988796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452008643] [2023-11-19 07:50:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:25,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:25,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:50:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:25,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:25,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:25,746 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 07:50:25,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:25,835 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 07:50:25,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452008643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:25,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:25,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-19 07:50:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326854509] [2023-11-19 07:50:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:50:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:50:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:25,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:25,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 929 flow. Second operand has 12 states, 12 states have (on average 84.5) internal successors, (1014), 12 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:50:25,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:25,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:25,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:26,361 INFO L124 PetriNetUnfolderBase]: 256/432 cut-off events. [2023-11-19 07:50:26,361 INFO L125 PetriNetUnfolderBase]: For 2508/2508 co-relation queries the response was YES. [2023-11-19 07:50:26,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 432 events. 256/432 cut-off events. For 2508/2508 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1552 event pairs, 1 based on Foata normal form. 10/442 useless extension candidates. Maximal degree in co-relation 2600. Up to 175 conditions per place. [2023-11-19 07:50:26,369 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 79 selfloop transitions, 50 changer transitions 1/130 dead transitions. [2023-11-19 07:50:26,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1546 flow [2023-11-19 07:50:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:50:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:50:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1138 transitions. [2023-11-19 07:50:26,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270168855534709 [2023-11-19 07:50:26,376 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1138 transitions. [2023-11-19 07:50:26,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1138 transitions. [2023-11-19 07:50:26,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:26,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1138 transitions. [2023-11-19 07:50:26,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.53846153846153) internal successors, (1138), 13 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states 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 07:50:26,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 07:50:26,388 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 07:50:26,388 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 929 flow. Second operand 13 states and 1138 transitions. [2023-11-19 07:50:26,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1546 flow [2023-11-19 07:50:26,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 1220 flow, removed 157 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:26,410 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 906 flow [2023-11-19 07:50:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=906, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2023-11-19 07:50:26,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-11-19 07:50:26,412 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 906 flow [2023-11-19 07:50:26,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 84.5) internal successors, (1014), 12 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:50:26,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:26,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:26,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:50:26,628 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 07:50:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 888235860, now seen corresponding path program 4 times [2023-11-19 07:50:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881873745] [2023-11-19 07:50:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:26,805 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 07:50:26,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:26,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881873745] [2023-11-19 07:50:26,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881873745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:26,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778337151] [2023-11-19 07:50:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:50:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:26,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:26,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:50:26,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:50:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:26,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:26,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:26,980 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 07:50:26,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:27,073 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 07:50:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778337151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:27,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:50:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257818392] [2023-11-19 07:50:27,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:27,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:27,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 906 flow. Second operand has 15 states, 15 states have (on average 83.86666666666666) internal successors, (1258), 15 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 07:50:27,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:27,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:27,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:27,955 INFO L124 PetriNetUnfolderBase]: 268/462 cut-off events. [2023-11-19 07:50:27,955 INFO L125 PetriNetUnfolderBase]: For 3507/3507 co-relation queries the response was YES. [2023-11-19 07:50:27,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 462 events. 268/462 cut-off events. For 3507/3507 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1743 event pairs, 17 based on Foata normal form. 24/486 useless extension candidates. Maximal degree in co-relation 2488. Up to 164 conditions per place. [2023-11-19 07:50:27,964 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 67 selfloop transitions, 74 changer transitions 4/145 dead transitions. [2023-11-19 07:50:27,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1504 flow [2023-11-19 07:50:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:50:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:50:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1997 transitions. [2023-11-19 07:50:27,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423541887592789 [2023-11-19 07:50:27,973 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1997 transitions. [2023-11-19 07:50:27,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1997 transitions. [2023-11-19 07:50:27,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:27,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1997 transitions. [2023-11-19 07:50:27,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.82608695652173) internal successors, (1997), 23 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states 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 07:50:27,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states 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 07:50:27,992 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states 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 07:50:27,992 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 906 flow. Second operand 23 states and 1997 transitions. [2023-11-19 07:50:27,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1504 flow [2023-11-19 07:50:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 145 transitions, 1441 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:28,013 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 1062 flow [2023-11-19 07:50:28,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1062, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-11-19 07:50:28,014 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-11-19 07:50:28,014 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 1062 flow [2023-11-19 07:50:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.86666666666666) internal successors, (1258), 15 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 07:50:28,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:28,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:28,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:50:28,229 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 07:50:28,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash -569334200, now seen corresponding path program 5 times [2023-11-19 07:50:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:28,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479193142] [2023-11-19 07:50:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:28,390 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 07:50:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479193142] [2023-11-19 07:50:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479193142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:28,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572420158] [2023-11-19 07:50:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:50:28,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:28,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:28,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:28,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:50:28,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:28,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:28,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:28,559 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 07:50:28,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:28,670 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 07:50:28,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572420158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:28,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:28,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:50:28,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339477417] [2023-11-19 07:50:28,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:28,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:50:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:50:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:50:28,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:28,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 1062 flow. Second operand has 14 states, 14 states have (on average 84.5) internal successors, (1183), 14 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 07:50:28,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:28,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:29,384 INFO L124 PetriNetUnfolderBase]: 328/568 cut-off events. [2023-11-19 07:50:29,384 INFO L125 PetriNetUnfolderBase]: For 4462/4462 co-relation queries the response was YES. [2023-11-19 07:50:29,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3341 conditions, 568 events. 328/568 cut-off events. For 4462/4462 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2295 event pairs, 27 based on Foata normal form. 14/582 useless extension candidates. Maximal degree in co-relation 3310. Up to 216 conditions per place. [2023-11-19 07:50:29,393 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 92 selfloop transitions, 79 changer transitions 1/172 dead transitions. [2023-11-19 07:50:29,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 2002 flow [2023-11-19 07:50:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:50:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:50:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1741 transitions. [2023-11-19 07:50:29,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246341463414634 [2023-11-19 07:50:29,398 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1741 transitions. [2023-11-19 07:50:29,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1741 transitions. [2023-11-19 07:50:29,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:29,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1741 transitions. [2023-11-19 07:50:29,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.05) internal successors, (1741), 20 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states 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 07:50:29,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 205.0) internal successors, (4305), 21 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states 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 07:50:29,416 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 205.0) internal successors, (4305), 21 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states 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 07:50:29,416 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 1062 flow. Second operand 20 states and 1741 transitions. [2023-11-19 07:50:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 2002 flow [2023-11-19 07:50:29,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1714 flow, removed 48 selfloop flow, removed 17 redundant places. [2023-11-19 07:50:29,453 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1336 flow [2023-11-19 07:50:29,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1336, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2023-11-19 07:50:29,454 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2023-11-19 07:50:29,454 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1336 flow [2023-11-19 07:50:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 84.5) internal successors, (1183), 14 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 07:50:29,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:29,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:29,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:50:29,672 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 07:50:29,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash 345749942, now seen corresponding path program 6 times [2023-11-19 07:50:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855792408] [2023-11-19 07:50:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:29,843 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 07:50:29,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:29,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855792408] [2023-11-19 07:50:29,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855792408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:29,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463749706] [2023-11-19 07:50:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:50:29,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:29,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:50:29,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:50:29,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:29,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:29,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:30,023 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 07:50:30,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:30,122 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 07:50:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463749706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:30,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:50:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580572197] [2023-11-19 07:50:30,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:30,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:30,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1336 flow. Second operand has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:30,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:30,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:31,025 INFO L124 PetriNetUnfolderBase]: 509/871 cut-off events. [2023-11-19 07:50:31,025 INFO L125 PetriNetUnfolderBase]: For 10384/10384 co-relation queries the response was YES. [2023-11-19 07:50:31,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 871 events. 509/871 cut-off events. For 10384/10384 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3899 event pairs, 70 based on Foata normal form. 36/907 useless extension candidates. Maximal degree in co-relation 5166. Up to 505 conditions per place. [2023-11-19 07:50:31,040 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 152 selfloop transitions, 113 changer transitions 3/268 dead transitions. [2023-11-19 07:50:31,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 268 transitions, 3214 flow [2023-11-19 07:50:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:50:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:50:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2090 transitions. [2023-11-19 07:50:31,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2023-11-19 07:50:31,046 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2090 transitions. [2023-11-19 07:50:31,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2090 transitions. [2023-11-19 07:50:31,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:31,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2090 transitions. [2023-11-19 07:50:31,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 07:50:31,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 205.0) internal successors, (5125), 25 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states 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 07:50:31,062 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 205.0) internal successors, (5125), 25 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states 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 07:50:31,063 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1336 flow. Second operand 24 states and 2090 transitions. [2023-11-19 07:50:31,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 268 transitions, 3214 flow [2023-11-19 07:50:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 268 transitions, 2976 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-19 07:50:31,114 INFO L231 Difference]: Finished difference. Result has 138 places, 193 transitions, 2479 flow [2023-11-19 07:50:31,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2479, PETRI_PLACES=138, PETRI_TRANSITIONS=193} [2023-11-19 07:50:31,115 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 109 predicate places. [2023-11-19 07:50:31,115 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 193 transitions, 2479 flow [2023-11-19 07:50:31,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:31,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:31,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:31,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:31,332 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 07:50:31,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash 328017224, now seen corresponding path program 7 times [2023-11-19 07:50:31,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410392294] [2023-11-19 07:50:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:31,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:31,496 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 07:50:31,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:31,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410392294] [2023-11-19 07:50:31,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410392294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:31,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465589665] [2023-11-19 07:50:31,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:50:31,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:31,498 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:31,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:50:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:31,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:31,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:31,670 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 07:50:31,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:31,760 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 07:50:31,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465589665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:31,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:31,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-19 07:50:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007351113] [2023-11-19 07:50:31,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:31,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:50:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:50:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:50:31,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:31,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 193 transitions, 2479 flow. Second operand has 14 states, 14 states have (on average 83.85714285714286) internal successors, (1174), 14 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 07:50:31,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:31,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:31,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:32,413 INFO L124 PetriNetUnfolderBase]: 549/935 cut-off events. [2023-11-19 07:50:32,414 INFO L125 PetriNetUnfolderBase]: For 10116/10116 co-relation queries the response was YES. [2023-11-19 07:50:32,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 935 events. 549/935 cut-off events. For 10116/10116 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4233 event pairs, 83 based on Foata normal form. 12/947 useless extension candidates. Maximal degree in co-relation 6174. Up to 584 conditions per place. [2023-11-19 07:50:32,430 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 104 selfloop transitions, 128 changer transitions 5/237 dead transitions. [2023-11-19 07:50:32,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 237 transitions, 3519 flow [2023-11-19 07:50:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:50:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:50:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1211 transitions. [2023-11-19 07:50:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2023-11-19 07:50:32,437 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1211 transitions. [2023-11-19 07:50:32,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1211 transitions. [2023-11-19 07:50:32,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:32,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1211 transitions. [2023-11-19 07:50:32,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.5) internal successors, (1211), 14 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states 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 07:50:32,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 205.0) internal successors, (3075), 15 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states 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 07:50:32,447 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 205.0) internal successors, (3075), 15 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states 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 07:50:32,448 INFO L175 Difference]: Start difference. First operand has 138 places, 193 transitions, 2479 flow. Second operand 14 states and 1211 transitions. [2023-11-19 07:50:32,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 237 transitions, 3519 flow [2023-11-19 07:50:32,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 2901 flow, removed 282 selfloop flow, removed 8 redundant places. [2023-11-19 07:50:32,525 INFO L231 Difference]: Finished difference. Result has 146 places, 215 transitions, 2739 flow [2023-11-19 07:50:32,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2739, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2023-11-19 07:50:32,526 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2023-11-19 07:50:32,527 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 2739 flow [2023-11-19 07:50:32,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.85714285714286) internal successors, (1174), 14 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 07:50:32,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:32,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:32,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:32,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:32,749 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 07:50:32,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -626446802, now seen corresponding path program 8 times [2023-11-19 07:50:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088697587] [2023-11-19 07:50:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:32,990 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 07:50:32,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:32,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088697587] [2023-11-19 07:50:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088697587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:32,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765111200] [2023-11-19 07:50:32,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:32,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:32,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:33,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:33,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:50:33,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:33,156 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 07:50:33,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:33,254 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 07:50:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765111200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:33,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-19 07:50:33,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296853852] [2023-11-19 07:50:33,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:33,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:33,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:33,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 2739 flow. Second operand has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:33,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:33,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:33,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:34,010 INFO L124 PetriNetUnfolderBase]: 535/935 cut-off events. [2023-11-19 07:50:34,010 INFO L125 PetriNetUnfolderBase]: For 7919/7919 co-relation queries the response was YES. [2023-11-19 07:50:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 935 events. 535/935 cut-off events. For 7919/7919 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4338 event pairs, 65 based on Foata normal form. 24/959 useless extension candidates. Maximal degree in co-relation 5997. Up to 488 conditions per place. [2023-11-19 07:50:34,024 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 99 selfloop transitions, 142 changer transitions 1/242 dead transitions. [2023-11-19 07:50:34,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 242 transitions, 3332 flow [2023-11-19 07:50:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:50:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:50:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1387 transitions. [2023-11-19 07:50:34,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228658536585366 [2023-11-19 07:50:34,029 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1387 transitions. [2023-11-19 07:50:34,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1387 transitions. [2023-11-19 07:50:34,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:34,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1387 transitions. [2023-11-19 07:50:34,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 86.6875) internal successors, (1387), 16 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 07:50:34,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states 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 07:50:34,041 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states 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 07:50:34,041 INFO L175 Difference]: Start difference. First operand has 146 places, 215 transitions, 2739 flow. Second operand 16 states and 1387 transitions. [2023-11-19 07:50:34,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 242 transitions, 3332 flow [2023-11-19 07:50:34,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 242 transitions, 3112 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-11-19 07:50:34,111 INFO L231 Difference]: Finished difference. Result has 157 places, 214 transitions, 2851 flow [2023-11-19 07:50:34,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2851, PETRI_PLACES=157, PETRI_TRANSITIONS=214} [2023-11-19 07:50:34,113 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-11-19 07:50:34,113 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 214 transitions, 2851 flow [2023-11-19 07:50:34,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:34,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:34,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:34,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:34,329 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 07:50:34,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -196777823, now seen corresponding path program 9 times [2023-11-19 07:50:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:34,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513493283] [2023-11-19 07:50:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:34,515 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 07:50:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513493283] [2023-11-19 07:50:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513493283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310912437] [2023-11-19 07:50:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:34,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:34,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:50:34,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:50:34,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:34,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:50:34,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:34,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310912437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:34,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:34,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-11-19 07:50:34,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792452465] [2023-11-19 07:50:34,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:50:34,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:50:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:34,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-11-19 07:50:34,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 214 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 94.55555555555556) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:34,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:34,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-11-19 07:50:34,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:35,179 INFO L124 PetriNetUnfolderBase]: 708/1257 cut-off events. [2023-11-19 07:50:35,179 INFO L125 PetriNetUnfolderBase]: For 12458/12458 co-relation queries the response was YES. [2023-11-19 07:50:35,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8556 conditions, 1257 events. 708/1257 cut-off events. For 12458/12458 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6495 event pairs, 42 based on Foata normal form. 11/1266 useless extension candidates. Maximal degree in co-relation 8506. Up to 675 conditions per place. [2023-11-19 07:50:35,204 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 183 selfloop transitions, 89 changer transitions 41/313 dead transitions. [2023-11-19 07:50:35,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 313 transitions, 4725 flow [2023-11-19 07:50:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 501 transitions. [2023-11-19 07:50:35,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48878048780487804 [2023-11-19 07:50:35,206 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 501 transitions. [2023-11-19 07:50:35,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 501 transitions. [2023-11-19 07:50:35,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:35,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 501 transitions. [2023-11-19 07:50:35,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 07:50:35,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:35,210 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 07:50:35,211 INFO L175 Difference]: Start difference. First operand has 157 places, 214 transitions, 2851 flow. Second operand 5 states and 501 transitions. [2023-11-19 07:50:35,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 313 transitions, 4725 flow [2023-11-19 07:50:35,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 313 transitions, 4264 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-11-19 07:50:35,311 INFO L231 Difference]: Finished difference. Result has 150 places, 235 transitions, 3212 flow [2023-11-19 07:50:35,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3212, PETRI_PLACES=150, PETRI_TRANSITIONS=235} [2023-11-19 07:50:35,312 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-11-19 07:50:35,312 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 235 transitions, 3212 flow [2023-11-19 07:50:35,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 94.55555555555556) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:35,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:35,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:35,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:35,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:35,528 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 07:50:35,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash -556962043, now seen corresponding path program 10 times [2023-11-19 07:50:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025851071] [2023-11-19 07:50:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:35,780 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 07:50:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:35,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025851071] [2023-11-19 07:50:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025851071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100318249] [2023-11-19 07:50:35,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:50:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:35,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:35,782 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:35,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:50:35,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:50:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:35,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:35,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:35,951 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 07:50:35,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:36,098 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 07:50:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100318249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:36,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 07:50:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712309385] [2023-11-19 07:50:36,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:36,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 235 transitions, 3212 flow. Second operand has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:36,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:36,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:36,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:37,463 INFO L124 PetriNetUnfolderBase]: 1195/1986 cut-off events. [2023-11-19 07:50:37,463 INFO L125 PetriNetUnfolderBase]: For 17397/17397 co-relation queries the response was YES. [2023-11-19 07:50:37,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14000 conditions, 1986 events. 1195/1986 cut-off events. For 17397/17397 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10427 event pairs, 13 based on Foata normal form. 16/2002 useless extension candidates. Maximal degree in co-relation 13949. Up to 766 conditions per place. [2023-11-19 07:50:37,505 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 275 selfloop transitions, 226 changer transitions 6/507 dead transitions. [2023-11-19 07:50:37,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 507 transitions, 7768 flow [2023-11-19 07:50:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:50:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1833 transitions. [2023-11-19 07:50:37,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578397212543556 [2023-11-19 07:50:37,515 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1833 transitions. [2023-11-19 07:50:37,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1833 transitions. [2023-11-19 07:50:37,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:37,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1833 transitions. [2023-11-19 07:50:37,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.28571428571429) internal successors, (1833), 21 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states 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 07:50:37,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 205.0) internal successors, (4510), 22 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states 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 07:50:37,535 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 205.0) internal successors, (4510), 22 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states 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 07:50:37,535 INFO L175 Difference]: Start difference. First operand has 150 places, 235 transitions, 3212 flow. Second operand 21 states and 1833 transitions. [2023-11-19 07:50:37,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 507 transitions, 7768 flow [2023-11-19 07:50:37,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 507 transitions, 7645 flow, removed 58 selfloop flow, removed 2 redundant places. [2023-11-19 07:50:37,699 INFO L231 Difference]: Finished difference. Result has 179 places, 393 transitions, 6140 flow [2023-11-19 07:50:37,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6140, PETRI_PLACES=179, PETRI_TRANSITIONS=393} [2023-11-19 07:50:37,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-11-19 07:50:37,700 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 393 transitions, 6140 flow [2023-11-19 07:50:37,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.2) internal successors, (1263), 15 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:50:37,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:37,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:37,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:37,901 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 07:50:37,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -140808441, now seen corresponding path program 11 times [2023-11-19 07:50:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997799737] [2023-11-19 07:50:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:38,209 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 07:50:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:38,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997799737] [2023-11-19 07:50:38,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997799737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:38,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164000433] [2023-11-19 07:50:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:50:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:38,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:38,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:50:38,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:50:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:38,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:50:38,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:38,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164000433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:38,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:38,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-19 07:50:38,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413917549] [2023-11-19 07:50:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:50:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:50:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:50:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:38,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 393 transitions, 6140 flow. Second operand has 21 states, 21 states have (on average 83.61904761904762) internal successors, (1756), 21 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 07:50:38,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:38,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:41,125 INFO L124 PetriNetUnfolderBase]: 1580/2596 cut-off events. [2023-11-19 07:50:41,125 INFO L125 PetriNetUnfolderBase]: For 38606/38606 co-relation queries the response was YES. [2023-11-19 07:50:41,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21684 conditions, 2596 events. 1580/2596 cut-off events. For 38606/38606 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14273 event pairs, 87 based on Foata normal form. 32/2628 useless extension candidates. Maximal degree in co-relation 21623. Up to 853 conditions per place. [2023-11-19 07:50:41,176 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 257 selfloop transitions, 364 changer transitions 6/627 dead transitions. [2023-11-19 07:50:41,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 627 transitions, 11232 flow [2023-11-19 07:50:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:50:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:50:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2168 transitions. [2023-11-19 07:50:41,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230243902439024 [2023-11-19 07:50:41,183 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2168 transitions. [2023-11-19 07:50:41,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2168 transitions. [2023-11-19 07:50:41,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:41,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2168 transitions. [2023-11-19 07:50:41,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 86.72) internal successors, (2168), 25 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 07:50:41,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 205.0) internal successors, (5330), 26 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states 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 07:50:41,201 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 205.0) internal successors, (5330), 26 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states 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 07:50:41,201 INFO L175 Difference]: Start difference. First operand has 179 places, 393 transitions, 6140 flow. Second operand 25 states and 2168 transitions. [2023-11-19 07:50:41,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 627 transitions, 11232 flow [2023-11-19 07:50:41,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 627 transitions, 10668 flow, removed 261 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:41,558 INFO L231 Difference]: Finished difference. Result has 208 places, 549 transitions, 9890 flow [2023-11-19 07:50:41,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9890, PETRI_PLACES=208, PETRI_TRANSITIONS=549} [2023-11-19 07:50:41,559 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 179 predicate places. [2023-11-19 07:50:41,559 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 549 transitions, 9890 flow [2023-11-19 07:50:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.61904761904762) internal successors, (1756), 21 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 07:50:41,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:41,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:41,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:41,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:41,761 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 07:50:41,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1095272467, now seen corresponding path program 12 times [2023-11-19 07:50:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053832998] [2023-11-19 07:50:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,112 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 07:50:42,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053832998] [2023-11-19 07:50:42,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053832998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106200816] [2023-11-19 07:50:42,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:50:42,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:42,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:42,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:50:42,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 07:50:42,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:42,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:42,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:42,344 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 07:50:42,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:42,522 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 07:50:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106200816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:42,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-19 07:50:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684033205] [2023-11-19 07:50:42,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:50:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:50:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:50:42,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:42,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 549 transitions, 9890 flow. Second operand has 22 states, 22 states have (on average 83.63636363636364) internal successors, (1840), 22 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 07:50:42,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:42,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:42,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:45,770 INFO L124 PetriNetUnfolderBase]: 1818/2931 cut-off events. [2023-11-19 07:50:45,771 INFO L125 PetriNetUnfolderBase]: For 65897/65897 co-relation queries the response was YES. [2023-11-19 07:50:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26959 conditions, 2931 events. 1818/2931 cut-off events. For 65897/65897 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16067 event pairs, 58 based on Foata normal form. 84/3015 useless extension candidates. Maximal degree in co-relation 26889. Up to 861 conditions per place. [2023-11-19 07:50:45,822 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 177 selfloop transitions, 636 changer transitions 23/836 dead transitions. [2023-11-19 07:50:45,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 836 transitions, 17044 flow [2023-11-19 07:50:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-19 07:50:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-19 07:50:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4068 transitions. [2023-11-19 07:50:45,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222106901920083 [2023-11-19 07:50:45,833 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4068 transitions. [2023-11-19 07:50:45,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4068 transitions. [2023-11-19 07:50:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:45,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4068 transitions. [2023-11-19 07:50:45,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 86.55319148936171) internal successors, (4068), 47 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states 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 07:50:45,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 205.0) internal successors, (9840), 48 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states 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 07:50:45,863 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 205.0) internal successors, (9840), 48 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states 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 07:50:45,863 INFO L175 Difference]: Start difference. First operand has 208 places, 549 transitions, 9890 flow. Second operand 47 states and 4068 transitions. [2023-11-19 07:50:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 836 transitions, 17044 flow [2023-11-19 07:50:46,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 836 transitions, 14430 flow, removed 1265 selfloop flow, removed 8 redundant places. [2023-11-19 07:50:46,629 INFO L231 Difference]: Finished difference. Result has 252 places, 723 transitions, 13564 flow [2023-11-19 07:50:46,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13564, PETRI_PLACES=252, PETRI_TRANSITIONS=723} [2023-11-19 07:50:46,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 223 predicate places. [2023-11-19 07:50:46,630 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 723 transitions, 13564 flow [2023-11-19 07:50:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.63636363636364) internal successors, (1840), 22 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 07:50:46,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:46,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:46,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-19 07:50:46,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:50:46,848 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 07:50:46,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 702187373, now seen corresponding path program 13 times [2023-11-19 07:50:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299148163] [2023-11-19 07:50:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,126 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 07:50:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299148163] [2023-11-19 07:50:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299148163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006601910] [2023-11-19 07:50:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:50:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:47,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:47,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:50:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:47,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:47,323 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 07:50:47,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:47,509 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 07:50:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006601910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:47,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:47,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-19 07:50:47,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362253763] [2023-11-19 07:50:47,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:50:47,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:50:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:50:47,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:47,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 723 transitions, 13564 flow. Second operand has 17 states, 17 states have (on average 83.88235294117646) internal successors, (1426), 17 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states 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 07:50:47,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:47,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:47,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:50,860 INFO L124 PetriNetUnfolderBase]: 1855/3012 cut-off events. [2023-11-19 07:50:50,860 INFO L125 PetriNetUnfolderBase]: For 39280/39280 co-relation queries the response was YES. [2023-11-19 07:50:50,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26890 conditions, 3012 events. 1855/3012 cut-off events. For 39280/39280 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 16785 event pairs, 85 based on Foata normal form. 64/3076 useless extension candidates. Maximal degree in co-relation 26813. Up to 839 conditions per place. [2023-11-19 07:50:50,915 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 353 selfloop transitions, 479 changer transitions 13/845 dead transitions. [2023-11-19 07:50:50,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 845 transitions, 16485 flow [2023-11-19 07:50:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:50:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-19 07:50:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3551 transitions. [2023-11-19 07:50:50,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248661511005353 [2023-11-19 07:50:50,922 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3551 transitions. [2023-11-19 07:50:50,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3551 transitions. [2023-11-19 07:50:50,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:50,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3551 transitions. [2023-11-19 07:50:50,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 86.60975609756098) internal successors, (3551), 41 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states 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 07:50:50,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 205.0) internal successors, (8610), 42 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states 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 07:50:50,944 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 205.0) internal successors, (8610), 42 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states 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 07:50:50,945 INFO L175 Difference]: Start difference. First operand has 252 places, 723 transitions, 13564 flow. Second operand 41 states and 3551 transitions. [2023-11-19 07:50:50,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 845 transitions, 16485 flow [2023-11-19 07:50:51,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 845 transitions, 14993 flow, removed 566 selfloop flow, removed 19 redundant places. [2023-11-19 07:50:51,606 INFO L231 Difference]: Finished difference. Result has 282 places, 744 transitions, 14000 flow [2023-11-19 07:50:51,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=11837, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=14000, PETRI_PLACES=282, PETRI_TRANSITIONS=744} [2023-11-19 07:50:51,608 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 253 predicate places. [2023-11-19 07:50:51,608 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 744 transitions, 14000 flow [2023-11-19 07:50:51,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 83.88235294117646) internal successors, (1426), 17 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states 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 07:50:51,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:51,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:51,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-19 07:50:51,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:51,815 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:51,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash -665681661, now seen corresponding path program 14 times [2023-11-19 07:50:51,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:51,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136995457] [2023-11-19 07:50:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:51,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:52,053 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 07:50:52,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:52,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136995457] [2023-11-19 07:50:52,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136995457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:52,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907459614] [2023-11-19 07:50:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:52,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:52,061 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:52,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:50:52,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:52,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:52,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:52,272 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 07:50:52,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:52,478 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 07:50:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907459614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:52,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-19 07:50:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53047977] [2023-11-19 07:50:52,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:50:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:50:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:50:52,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:52,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 744 transitions, 14000 flow. Second operand has 16 states, 16 states have (on average 83.9375) internal successors, (1343), 16 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states 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 07:50:52,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:52,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:52,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:55,381 INFO L124 PetriNetUnfolderBase]: 1897/3088 cut-off events. [2023-11-19 07:50:55,381 INFO L125 PetriNetUnfolderBase]: For 38966/38966 co-relation queries the response was YES. [2023-11-19 07:50:55,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27217 conditions, 3088 events. 1897/3088 cut-off events. For 38966/38966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17397 event pairs, 119 based on Foata normal form. 16/3104 useless extension candidates. Maximal degree in co-relation 27131. Up to 1095 conditions per place. [2023-11-19 07:50:55,445 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 467 selfloop transitions, 410 changer transitions 0/877 dead transitions. [2023-11-19 07:50:55,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 877 transitions, 17040 flow [2023-11-19 07:50:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:50:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 07:50:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3382 transitions. [2023-11-19 07:50:55,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42301438398999375 [2023-11-19 07:50:55,457 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3382 transitions. [2023-11-19 07:50:55,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3382 transitions. [2023-11-19 07:50:55,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:55,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3382 transitions. [2023-11-19 07:50:55,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 86.71794871794872) internal successors, (3382), 39 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states 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 07:50:55,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 205.0) internal successors, (8200), 40 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states 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 07:50:55,482 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 205.0) internal successors, (8200), 40 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states 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 07:50:55,482 INFO L175 Difference]: Start difference. First operand has 282 places, 744 transitions, 14000 flow. Second operand 39 states and 3382 transitions. [2023-11-19 07:50:55,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 877 transitions, 17040 flow [2023-11-19 07:50:56,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 877 transitions, 16642 flow, removed 148 selfloop flow, removed 16 redundant places. [2023-11-19 07:50:56,478 INFO L231 Difference]: Finished difference. Result has 309 places, 773 transitions, 15165 flow [2023-11-19 07:50:56,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=13586, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=15165, PETRI_PLACES=309, PETRI_TRANSITIONS=773} [2023-11-19 07:50:56,481 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 280 predicate places. [2023-11-19 07:50:56,481 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 773 transitions, 15165 flow [2023-11-19 07:50:56,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.9375) internal successors, (1343), 16 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states 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 07:50:56,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:56,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:56,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:56,696 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 07:50:56,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1839442597, now seen corresponding path program 15 times [2023-11-19 07:50:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:56,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704474630] [2023-11-19 07:50:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:57,096 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 07:50:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704474630] [2023-11-19 07:50:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704474630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510678368] [2023-11-19 07:50:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:57,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:57,101 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:57,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef79c54d-0cf5-4904-b523-675fff65cea0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:50:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:50:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:57,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:57,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:57,362 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 07:50:57,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:57,578 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 07:50:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510678368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:57,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:57,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-19 07:50:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634265025] [2023-11-19 07:50:57,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:57,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:50:57,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:50:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:50:57,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-11-19 07:50:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 773 transitions, 15165 flow. Second operand has 22 states, 22 states have (on average 83.54545454545455) internal successors, (1838), 22 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states 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 07:50:57,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:57,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-11-19 07:50:57,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand