./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/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_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/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_4a110849-ece2-4ea2-b2e2-f4493c23527e/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 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:12,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:12,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:00:12,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:12,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:12,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:12,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:12,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:12,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:12,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:12,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:12,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:12,874 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:12,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:12,876 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:12,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:12,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:12,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:12,878 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:00:12,878 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:00:12,879 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:00:12,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:12,880 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:00:12,881 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:00:12,881 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:12,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:12,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:12,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:12,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:12,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:12,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:12,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:12,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:12,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:12,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:12,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:12,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:12,887 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:12,887 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_4a110849-ece2-4ea2-b2e2-f4493c23527e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2023-11-19 08:00:13,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:13,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:13,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:13,229 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:13,230 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:13,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 08:00:16,468 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:16,702 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:16,702 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 08:00:16,711 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/data/0f26bdbe6/edf14fc9f4ec4ed19e6b1918a751d47c/FLAGde6c04823 [2023-11-19 08:00:16,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/data/0f26bdbe6/edf14fc9f4ec4ed19e6b1918a751d47c [2023-11-19 08:00:16,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:16,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:16,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:16,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:16,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:16,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:16" (1/1) ... [2023-11-19 08:00:16,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2824b833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:16, skipping insertion in model container [2023-11-19 08:00:16,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:16" (1/1) ... [2023-11-19 08:00:16,766 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:16,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:16,973 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:17,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:17,011 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:17,011 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:17,020 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:17,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17 WrapperNode [2023-11-19 08:00:17,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:17,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:17,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:17,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:17,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,057 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2023-11-19 08:00:17,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:17,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:17,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:17,059 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:17,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,071 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:17,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:17,091 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:17,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:17,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (1/1) ... [2023-11-19 08:00:17,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:17,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:17,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:00:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:00:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:00:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:00:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:00:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:00:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:17,199 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 08:00:17,358 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:17,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:17,610 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:17,658 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:17,658 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:00:17,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:17 BoogieIcfgContainer [2023-11-19 08:00:17,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:17,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:17,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:17,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:17,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:16" (1/3) ... [2023-11-19 08:00:17,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea70014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:17, skipping insertion in model container [2023-11-19 08:00:17,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:17" (2/3) ... [2023-11-19 08:00:17,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea70014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:17, skipping insertion in model container [2023-11-19 08:00:17,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:17" (3/3) ... [2023-11-19 08:00:17,678 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-19 08:00:17,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:17,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 08:00:17,701 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:17,826 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:00:17,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 93 transitions, 200 flow [2023-11-19 08:00:17,935 INFO L124 PetriNetUnfolderBase]: 5/91 cut-off events. [2023-11-19 08:00:17,935 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 5/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-11-19 08:00:17,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 93 transitions, 200 flow [2023-11-19 08:00:17,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 86 transitions, 184 flow [2023-11-19 08:00:17,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:17,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 86 transitions, 184 flow [2023-11-19 08:00:17,971 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 86 transitions, 184 flow [2023-11-19 08:00:17,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 86 transitions, 184 flow [2023-11-19 08:00:18,023 INFO L124 PetriNetUnfolderBase]: 5/86 cut-off events. [2023-11-19 08:00:18,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:18,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-11-19 08:00:18,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2023-11-19 08:00:21,000 INFO L134 LiptonReduction]: Checked pairs total: 825 [2023-11-19 08:00:21,000 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-11-19 08:00:21,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:21,038 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;@3b846019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:21,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 08:00:21,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:21,041 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:00:21,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:21,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:00:21,042 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 08:00:21,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 376, now seen corresponding path program 1 times [2023-11-19 08:00:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688011206] [2023-11-19 08:00:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:21,159 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 08:00:21,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:21,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688011206] [2023-11-19 08:00:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688011206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:21,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:00:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340273083] [2023-11-19 08:00:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:21,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 177 [2023-11-19 08:00:21,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 08:00:21,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:21,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 177 [2023-11-19 08:00:21,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:21,272 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-19 08:00:21,273 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:00:21,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 378 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 08:00:21,276 INFO L140 encePairwiseOnDemand]: 174/177 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-19 08:00:21,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-19 08:00:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:00:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-11-19 08:00:21,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536723163841808 [2023-11-19 08:00:21,293 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-11-19 08:00:21,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-11-19 08:00:21,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:21,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-11-19 08:00:21,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 08:00:21,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 08:00:21,307 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 08:00:21,309 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2023-11-19 08:00:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-19 08:00:21,313 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 08:00:21,315 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-19 08:00:21,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:21,321 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 08:00:21,321 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-19 08:00:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 08:00:21,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:21,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:00:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:21,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:21,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash 368769, now seen corresponding path program 1 times [2023-11-19 08:00:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139111679] [2023-11-19 08:00:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:21,564 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 08:00:21,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:21,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139111679] [2023-11-19 08:00:21,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139111679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:21,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666484274] [2023-11-19 08:00:21,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:21,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 177 [2023-11-19 08:00:21,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:21,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:21,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 177 [2023-11-19 08:00:21,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:21,665 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-19 08:00:21,665 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:21,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 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 08:00:21,667 INFO L140 encePairwiseOnDemand]: 174/177 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-19 08:00:21,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-19 08:00:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-11-19 08:00:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-11-19 08:00:21,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-11-19 08:00:21,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-11-19 08:00:21,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:21,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-11-19 08:00:21,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 08:00:21,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:21,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:21,677 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 240 transitions. [2023-11-19 08:00:21,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-19 08:00:21,677 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 08:00:21,678 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-19 08:00:21,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:21,679 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-19 08:00:21,680 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-19 08:00:21,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:21,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:21,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:00:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:21,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:21,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 368767, now seen corresponding path program 1 times [2023-11-19 08:00:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876727439] [2023-11-19 08:00:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:21,804 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 08:00:21,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:21,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876727439] [2023-11-19 08:00:21,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876727439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:21,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:21,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:21,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063244232] [2023-11-19 08:00:21,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:21,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:21,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:21,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 177 [2023-11-19 08:00:21,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 08:00:21,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:21,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 177 [2023-11-19 08:00:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:21,914 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-19 08:00:21,915 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:21,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 295 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 08:00:21,916 INFO L140 encePairwiseOnDemand]: 174/177 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-19 08:00:21,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-19 08:00:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-11-19 08:00:21,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538606403013183 [2023-11-19 08:00:21,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-11-19 08:00:21,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-11-19 08:00:21,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:21,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-11-19 08:00:21,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:21,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:21,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:21,923 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 241 transitions. [2023-11-19 08:00:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-19 08:00:21,924 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 08:00:21,924 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-19 08:00:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:21,925 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 08:00:21,926 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-19 08:00:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 08:00:21,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:21,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:00:21,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:21,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:21,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 354394491, now seen corresponding path program 1 times [2023-11-19 08:00:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87878522] [2023-11-19 08:00:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,011 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 08:00:22,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87878522] [2023-11-19 08:00:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87878522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:22,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032415710] [2023-11-19 08:00:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:22,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:22,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 177 [2023-11-19 08:00:22,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 08:00:22,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:22,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 177 [2023-11-19 08:00:22,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:22,117 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-19 08:00:22,117 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:22,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 210 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 08:00:22,118 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-19 08:00:22,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-19 08:00:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-11-19 08:00:22,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218455743879473 [2023-11-19 08:00:22,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-11-19 08:00:22,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-11-19 08:00:22,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:22,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-11-19 08:00:22,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 08:00:22,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,125 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 224 transitions. [2023-11-19 08:00:22,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-19 08:00:22,125 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 08:00:22,126 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-19 08:00:22,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:22,127 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 08:00:22,127 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-19 08:00:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 08:00:22,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:22,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:00:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:22,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:22,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 354394492, now seen corresponding path program 1 times [2023-11-19 08:00:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:22,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80796214] [2023-11-19 08:00:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,170 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 08:00:22,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80796214] [2023-11-19 08:00:22,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80796214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:22,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:22,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:22,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589697323] [2023-11-19 08:00:22,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:22,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:22,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:22,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 177 [2023-11-19 08:00:22,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 08:00:22,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:22,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 177 [2023-11-19 08:00:22,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:22,236 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-19 08:00:22,236 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:22,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 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 08:00:22,238 INFO L140 encePairwiseOnDemand]: 175/177 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-19 08:00:22,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-19 08:00:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-11-19 08:00:22,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448210922787194 [2023-11-19 08:00:22,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-11-19 08:00:22,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-11-19 08:00:22,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:22,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-11-19 08:00:22,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 08:00:22,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,244 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 238 transitions. [2023-11-19 08:00:22,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-19 08:00:22,244 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 08:00:22,245 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-19 08:00:22,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:22,246 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-19 08:00:22,246 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-19 08:00:22,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 08:00:22,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:22,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:00:22,247 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 08:00:22,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1359615426, now seen corresponding path program 1 times [2023-11-19 08:00:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966808084] [2023-11-19 08:00:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,302 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 08:00:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966808084] [2023-11-19 08:00:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966808084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710958003] [2023-11-19 08:00:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:22,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:22,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 177 [2023-11-19 08:00:22,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:22,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:22,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 177 [2023-11-19 08:00:22,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:22,368 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-19 08:00:22,368 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 116 events. 60/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 308 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 08:00:22,370 INFO L140 encePairwiseOnDemand]: 173/177 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-19 08:00:22,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 112 flow [2023-11-19 08:00:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-11-19 08:00:22,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141242937853108 [2023-11-19 08:00:22,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-11-19 08:00:22,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-11-19 08:00:22,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:22,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-11-19 08:00:22,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 08:00:22,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 08:00:22,376 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 273 transitions. [2023-11-19 08:00:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 112 flow [2023-11-19 08:00:22,377 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 08:00:22,378 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-11-19 08:00:22,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:22,381 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-19 08:00:22,384 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-11-19 08:00:22,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:22,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:22,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:22,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:22,386 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 08:00:22,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1927317645, now seen corresponding path program 1 times [2023-11-19 08:00:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426767525] [2023-11-19 08:00:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,526 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 08:00:22,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426767525] [2023-11-19 08:00:22,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426767525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:22,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:22,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:00:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651672045] [2023-11-19 08:00:22,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:22,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:22,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-11-19 08:00:22,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:22,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:22,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-11-19 08:00:22,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:22,678 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-19 08:00:22,678 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 08:00:22,680 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 08:00:22,681 INFO L140 encePairwiseOnDemand]: 172/177 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-19 08:00:22,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 136 flow [2023-11-19 08:00:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 389 transitions. [2023-11-19 08:00:22,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43954802259887005 [2023-11-19 08:00:22,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 389 transitions. [2023-11-19 08:00:22,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 389 transitions. [2023-11-19 08:00:22,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:22,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 389 transitions. [2023-11-19 08:00:22,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:22,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:22,694 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:22,694 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 5 states and 389 transitions. [2023-11-19 08:00:22,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 136 flow [2023-11-19 08:00:22,697 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 08:00:22,698 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 79 flow [2023-11-19 08:00:22,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, 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 08:00:22,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 08:00:22,700 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 79 flow [2023-11-19 08:00:22,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:22,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:22,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:22,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:00:22,701 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 08:00:22,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1231491311, now seen corresponding path program 2 times [2023-11-19 08:00:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:22,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487185513] [2023-11-19 08:00:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,851 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 08:00:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487185513] [2023-11-19 08:00:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487185513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:22,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80365255] [2023-11-19 08:00:22,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:22,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:22,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:22,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:22,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:22,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:22,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:22,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:22,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:23,039 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 08:00:23,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:23,073 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 08:00:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80365255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:23,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:23,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 08:00:23,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395469911] [2023-11-19 08:00:23,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:23,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:00:23,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:00:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:00:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:23,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 79 flow. Second operand has 8 states, 8 states have (on average 73.75) internal successors, (590), 8 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:23,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:23,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:23,323 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-19 08:00:23,323 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-19 08:00:23,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 105 events. 56/105 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 333. Up to 34 conditions per place. [2023-11-19 08:00:23,326 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 32 selfloop transitions, 9 changer transitions 0/41 dead transitions. [2023-11-19 08:00:23,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 235 flow [2023-11-19 08:00:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:00:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:00:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2023-11-19 08:00:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350282485875706 [2023-11-19 08:00:23,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2023-11-19 08:00:23,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2023-11-19 08:00:23,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:23,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2023-11-19 08:00:23,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 08:00:23,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 177.0) internal successors, (1416), 8 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states 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 08:00:23,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 177.0) internal successors, (1416), 8 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states 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 08:00:23,338 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 79 flow. Second operand 7 states and 539 transitions. [2023-11-19 08:00:23,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 235 flow [2023-11-19 08:00:23,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 219 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 08:00:23,343 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 121 flow [2023-11-19 08:00:23,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-11-19 08:00:23,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-19 08:00:23,347 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 121 flow [2023-11-19 08:00:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 73.75) internal successors, (590), 8 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:23,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:23,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:23,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:23,569 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 08:00:23,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash -210388745, now seen corresponding path program 3 times [2023-11-19 08:00:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699468610] [2023-11-19 08:00:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:23,668 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 08:00:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699468610] [2023-11-19 08:00:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699468610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:00:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835392867] [2023-11-19 08:00:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:23,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 177 [2023-11-19 08:00:23,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:23,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:23,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 177 [2023-11-19 08:00:23,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:23,809 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-19 08:00:23,809 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-19 08:00:23,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 136 events. 71/136 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 17 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 497. Up to 75 conditions per place. [2023-11-19 08:00:23,812 INFO L140 encePairwiseOnDemand]: 172/177 looper letters, 32 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2023-11-19 08:00:23,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 288 flow [2023-11-19 08:00:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2023-11-19 08:00:23,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497175141242938 [2023-11-19 08:00:23,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2023-11-19 08:00:23,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2023-11-19 08:00:23,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:23,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2023-11-19 08:00:23,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 08:00:23,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:23,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:23,820 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 121 flow. Second operand 5 states and 398 transitions. [2023-11-19 08:00:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 288 flow [2023-11-19 08:00:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 252 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:23,827 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 146 flow [2023-11-19 08:00:23,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2023-11-19 08:00:23,829 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-11-19 08:00:23,834 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 146 flow [2023-11-19 08:00:23,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:23,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:23,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:23,836 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 08:00:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 136969227, now seen corresponding path program 4 times [2023-11-19 08:00:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704055755] [2023-11-19 08:00:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:23,933 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 08:00:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704055755] [2023-11-19 08:00:23,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704055755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066042503] [2023-11-19 08:00:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:23,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:23,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:24,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:24,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:24,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:24,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:24,075 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 08:00:24,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:24,122 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 08:00:24,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066042503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:24,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 08:00:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423049606] [2023-11-19 08:00:24,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:00:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:00:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:00:24,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:24,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 146 flow. Second operand has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 08:00:24,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:24,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:24,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:24,361 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2023-11-19 08:00:24,361 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-19 08:00:24,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 161 events. 86/161 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 479 event pairs, 14 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 635. Up to 82 conditions per place. [2023-11-19 08:00:24,364 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-19 08:00:24,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 407 flow [2023-11-19 08:00:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:00:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:00:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 761 transitions. [2023-11-19 08:00:24,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42994350282485877 [2023-11-19 08:00:24,368 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 761 transitions. [2023-11-19 08:00:24,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 761 transitions. [2023-11-19 08:00:24,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:24,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 761 transitions. [2023-11-19 08:00:24,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.1) internal successors, (761), 10 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 08:00:24,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 177.0) internal successors, (1947), 11 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states 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 08:00:24,377 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 177.0) internal successors, (1947), 11 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states 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 08:00:24,377 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 146 flow. Second operand 10 states and 761 transitions. [2023-11-19 08:00:24,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 407 flow [2023-11-19 08:00:24,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 369 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:24,381 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 224 flow [2023-11-19 08:00:24,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=224, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-11-19 08:00:24,382 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-11-19 08:00:24,383 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 224 flow [2023-11-19 08:00:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 08:00:24,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:24,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:24,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:00:24,609 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 08:00:24,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -383555921, now seen corresponding path program 5 times [2023-11-19 08:00:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559532010] [2023-11-19 08:00:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:24,682 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 08:00:24,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559532010] [2023-11-19 08:00:24,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559532010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:24,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134433884] [2023-11-19 08:00:24,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:24,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:24,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:24,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:24,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:24,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:24,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:24,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:24,803 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 08:00:24,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:24,829 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 08:00:24,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134433884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:24,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:24,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 08:00:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730561550] [2023-11-19 08:00:24,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:00:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:00:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:00:24,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:24,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 224 flow. Second operand has 10 states, 10 states have (on average 73.3) internal successors, (733), 10 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 08:00:24,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:24,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:24,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:25,037 INFO L124 PetriNetUnfolderBase]: 80/155 cut-off events. [2023-11-19 08:00:25,037 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2023-11-19 08:00:25,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 155 events. 80/155 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 447 event pairs, 21 based on Foata normal form. 6/161 useless extension candidates. Maximal degree in co-relation 637. Up to 105 conditions per place. [2023-11-19 08:00:25,040 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 30 selfloop transitions, 16 changer transitions 1/47 dead transitions. [2023-11-19 08:00:25,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 397 flow [2023-11-19 08:00:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:00:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:00:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2023-11-19 08:00:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350282485875706 [2023-11-19 08:00:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 462 transitions. [2023-11-19 08:00:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 462 transitions. [2023-11-19 08:00:25,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 462 transitions. [2023-11-19 08:00:25,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 08:00:25,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:25,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:25,048 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 224 flow. Second operand 6 states and 462 transitions. [2023-11-19 08:00:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 397 flow [2023-11-19 08:00:25,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 351 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-19 08:00:25,053 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 266 flow [2023-11-19 08:00:25,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-11-19 08:00:25,054 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-11-19 08:00:25,054 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 266 flow [2023-11-19 08:00:25,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.3) internal successors, (733), 10 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 08:00:25,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:25,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:25,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:25,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:00:25,276 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 08:00:25,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1269541435, now seen corresponding path program 6 times [2023-11-19 08:00:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:25,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78895758] [2023-11-19 08:00:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:25,344 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 08:00:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78895758] [2023-11-19 08:00:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78895758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:00:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536718462] [2023-11-19 08:00:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:25,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-11-19 08:00:25,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:25,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:25,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-11-19 08:00:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:25,467 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-19 08:00:25,468 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-19 08:00:25,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 140 events. 75/140 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 17 based on Foata normal form. 2/142 useless extension candidates. Maximal degree in co-relation 599. Up to 87 conditions per place. [2023-11-19 08:00:25,470 INFO L140 encePairwiseOnDemand]: 172/177 looper letters, 26 selfloop transitions, 14 changer transitions 2/42 dead transitions. [2023-11-19 08:00:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 367 flow [2023-11-19 08:00:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 387 transitions. [2023-11-19 08:00:25,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43728813559322033 [2023-11-19 08:00:25,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 387 transitions. [2023-11-19 08:00:25,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 387 transitions. [2023-11-19 08:00:25,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:25,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 387 transitions. [2023-11-19 08:00:25,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states 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 08:00:25,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:25,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:25,478 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 266 flow. Second operand 5 states and 387 transitions. [2023-11-19 08:00:25,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 367 flow [2023-11-19 08:00:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 291 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-19 08:00:25,482 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 214 flow [2023-11-19 08:00:25,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-11-19 08:00:25,483 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-11-19 08:00:25,484 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 214 flow [2023-11-19 08:00:25,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:25,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:25,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:25,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:00:25,485 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 08:00:25,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1280029646, now seen corresponding path program 1 times [2023-11-19 08:00:25,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:25,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126729467] [2023-11-19 08:00:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:25,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126729467] [2023-11-19 08:00:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126729467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985964415] [2023-11-19 08:00:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:25,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:25,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:25,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:25,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:25,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:25,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:25,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985964415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:25,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:25,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 4 [2023-11-19 08:00:25,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916406869] [2023-11-19 08:00:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:25,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:00:25,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 177 [2023-11-19 08:00:25,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:25,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:25,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 177 [2023-11-19 08:00:25,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:25,840 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2023-11-19 08:00:25,841 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2023-11-19 08:00:25,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 254 events. 136/254 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 18 based on Foata normal form. 7/261 useless extension candidates. Maximal degree in co-relation 947. Up to 123 conditions per place. [2023-11-19 08:00:25,844 INFO L140 encePairwiseOnDemand]: 173/177 looper letters, 45 selfloop transitions, 11 changer transitions 11/67 dead transitions. [2023-11-19 08:00:25,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 508 flow [2023-11-19 08:00:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:00:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 367 transitions. [2023-11-19 08:00:25,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518361581920904 [2023-11-19 08:00:25,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 367 transitions. [2023-11-19 08:00:25,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 367 transitions. [2023-11-19 08:00:25,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:25,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 367 transitions. [2023-11-19 08:00:25,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 08:00:25,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 08:00:25,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 08:00:25,852 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 214 flow. Second operand 4 states and 367 transitions. [2023-11-19 08:00:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 508 flow [2023-11-19 08:00:25,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 462 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:25,858 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 286 flow [2023-11-19 08:00:25,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 08:00:25,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-11-19 08:00:25,861 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 286 flow [2023-11-19 08:00:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:25,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:25,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:00:26,075 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 08:00:26,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1398109217, now seen corresponding path program 2 times [2023-11-19 08:00:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:26,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549842137] [2023-11-19 08:00:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:26,173 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 08:00:26,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549842137] [2023-11-19 08:00:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549842137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791040839] [2023-11-19 08:00:26,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:26,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:26,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:26,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:26,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:26,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:26,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:26,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791040839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:26,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:26,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 08:00:26,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608608393] [2023-11-19 08:00:26,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:26,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:00:26,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:00:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:00:26,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:26,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 286 flow. Second operand has 11 states, 11 states have (on average 73.45454545454545) internal successors, (808), 11 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:00:26,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:26,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:26,778 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2023-11-19 08:00:26,778 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2023-11-19 08:00:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 293 events. 150/293 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1128 event pairs, 11 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1172. Up to 95 conditions per place. [2023-11-19 08:00:26,783 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 53 selfloop transitions, 23 changer transitions 10/86 dead transitions. [2023-11-19 08:00:26,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 673 flow [2023-11-19 08:00:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:00:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:00:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 770 transitions. [2023-11-19 08:00:26,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350282485875706 [2023-11-19 08:00:26,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 770 transitions. [2023-11-19 08:00:26,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 770 transitions. [2023-11-19 08:00:26,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:26,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 770 transitions. [2023-11-19 08:00:26,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 08:00:26,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 177.0) internal successors, (1947), 11 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states 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 08:00:26,797 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 177.0) internal successors, (1947), 11 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states 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 08:00:26,797 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 286 flow. Second operand 10 states and 770 transitions. [2023-11-19 08:00:26,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 673 flow [2023-11-19 08:00:26,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 86 transitions, 657 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:26,804 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 444 flow [2023-11-19 08:00:26,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-11-19 08:00:26,805 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-11-19 08:00:26,805 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 444 flow [2023-11-19 08:00:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.45454545454545) internal successors, (808), 11 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:00:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:26,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:00:27,015 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 08:00:27,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 832210629, now seen corresponding path program 3 times [2023-11-19 08:00:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:27,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432394290] [2023-11-19 08:00:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:27,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:27,131 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 08:00:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:27,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432394290] [2023-11-19 08:00:27,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432394290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:27,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180295793] [2023-11-19 08:00:27,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:27,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:27,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:27,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:27,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:27,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:00:27,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:27,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:27,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:27,280 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 08:00:27,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:27,321 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 08:00:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180295793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:27,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 08:00:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336189056] [2023-11-19 08:00:27,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:27,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:27,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 444 flow. Second operand has 12 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 08:00:27,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:27,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:27,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:27,684 INFO L124 PetriNetUnfolderBase]: 193/339 cut-off events. [2023-11-19 08:00:27,684 INFO L125 PetriNetUnfolderBase]: For 1391/1391 co-relation queries the response was YES. [2023-11-19 08:00:27,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 339 events. 193/339 cut-off events. For 1391/1391 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1192 event pairs, 28 based on Foata normal form. 12/351 useless extension candidates. Maximal degree in co-relation 1719. Up to 157 conditions per place. [2023-11-19 08:00:27,690 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 53 selfloop transitions, 44 changer transitions 1/98 dead transitions. [2023-11-19 08:00:27,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 1007 flow [2023-11-19 08:00:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:00:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:00:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 985 transitions. [2023-11-19 08:00:27,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280747501086484 [2023-11-19 08:00:27,695 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 985 transitions. [2023-11-19 08:00:27,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 985 transitions. [2023-11-19 08:00:27,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:27,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 985 transitions. [2023-11-19 08:00:27,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.76923076923077) internal successors, (985), 13 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 08:00:27,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 177.0) internal successors, (2478), 14 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 08:00:27,706 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 177.0) internal successors, (2478), 14 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 08:00:27,707 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 444 flow. Second operand 13 states and 985 transitions. [2023-11-19 08:00:27,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 1007 flow [2023-11-19 08:00:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 941 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-19 08:00:27,718 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 793 flow [2023-11-19 08:00:27,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=793, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-11-19 08:00:27,719 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-11-19 08:00:27,720 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 793 flow [2023-11-19 08:00:27,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 08:00:27,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:27,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:27,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:27,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:00:27,934 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 08:00:27,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2060018579, now seen corresponding path program 4 times [2023-11-19 08:00:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:27,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242275969] [2023-11-19 08:00:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:28,020 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 08:00:28,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242275969] [2023-11-19 08:00:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242275969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288741649] [2023-11-19 08:00:28,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:28,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:28,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:28,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:28,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:28,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:28,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:28,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:28,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:28,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:28,260 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 08:00:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288741649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:28,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:28,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 08:00:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86842101] [2023-11-19 08:00:28,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:28,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:00:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:00:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:00:28,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:28,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 793 flow. Second operand has 12 states, 12 states have (on average 73.33333333333333) internal successors, (880), 12 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 08:00:28,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:28,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:28,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:28,659 INFO L124 PetriNetUnfolderBase]: 188/350 cut-off events. [2023-11-19 08:00:28,659 INFO L125 PetriNetUnfolderBase]: For 2200/2200 co-relation queries the response was YES. [2023-11-19 08:00:28,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 350 events. 188/350 cut-off events. For 2200/2200 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1322 event pairs, 21 based on Foata normal form. 26/376 useless extension candidates. Maximal degree in co-relation 1949. Up to 132 conditions per place. [2023-11-19 08:00:28,664 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 54 selfloop transitions, 52 changer transitions 1/107 dead transitions. [2023-11-19 08:00:28,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 107 transitions, 1180 flow [2023-11-19 08:00:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:00:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:00:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1214 transitions. [2023-11-19 08:00:28,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286723163841808 [2023-11-19 08:00:28,670 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1214 transitions. [2023-11-19 08:00:28,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1214 transitions. [2023-11-19 08:00:28,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:28,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1214 transitions. [2023-11-19 08:00:28,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 08:00:28,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 177.0) internal successors, (3009), 17 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states 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 08:00:28,682 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 177.0) internal successors, (3009), 17 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states 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 08:00:28,682 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 793 flow. Second operand 16 states and 1214 transitions. [2023-11-19 08:00:28,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 107 transitions, 1180 flow [2023-11-19 08:00:28,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 984 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-19 08:00:28,699 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 771 flow [2023-11-19 08:00:28,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=771, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-11-19 08:00:28,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-19 08:00:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 771 flow [2023-11-19 08:00:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.33333333333333) internal successors, (880), 12 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 08:00:28,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:28,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:00:28,921 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 08:00:28,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1158433751, now seen corresponding path program 5 times [2023-11-19 08:00:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:28,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976291829] [2023-11-19 08:00:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:29,005 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 08:00:29,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976291829] [2023-11-19 08:00:29,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976291829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43056788] [2023-11-19 08:00:29,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:29,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:29,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:29,008 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:29,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:29,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:29,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:29,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:29,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:29,218 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 08:00:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43056788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:29,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:29,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 08:00:29,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936131373] [2023-11-19 08:00:29,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:29,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:29,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:29,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 771 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states 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 08:00:29,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:29,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:29,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:29,609 INFO L124 PetriNetUnfolderBase]: 246/452 cut-off events. [2023-11-19 08:00:29,609 INFO L125 PetriNetUnfolderBase]: For 2085/2085 co-relation queries the response was YES. [2023-11-19 08:00:29,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 452 events. 246/452 cut-off events. For 2085/2085 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1832 event pairs, 29 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 2449. Up to 180 conditions per place. [2023-11-19 08:00:29,616 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 76 selfloop transitions, 54 changer transitions 0/130 dead transitions. [2023-11-19 08:00:29,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1404 flow [2023-11-19 08:00:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:00:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 08:00:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1063 transitions. [2023-11-19 08:00:29,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42897497982243743 [2023-11-19 08:00:29,623 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1063 transitions. [2023-11-19 08:00:29,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1063 transitions. [2023-11-19 08:00:29,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:29,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1063 transitions. [2023-11-19 08:00:29,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 75.92857142857143) internal successors, (1063), 14 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states 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 08:00:29,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 177.0) internal successors, (2655), 15 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states 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 08:00:29,635 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 177.0) internal successors, (2655), 15 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states 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 08:00:29,635 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 771 flow. Second operand 14 states and 1063 transitions. [2023-11-19 08:00:29,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1404 flow [2023-11-19 08:00:29,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1243 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-19 08:00:29,654 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 1055 flow [2023-11-19 08:00:29,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1055, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2023-11-19 08:00:29,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2023-11-19 08:00:29,655 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 1055 flow [2023-11-19 08:00:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states 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 08:00:29,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:29,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:29,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:00:29,871 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 08:00:29,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1898906197, now seen corresponding path program 6 times [2023-11-19 08:00:29,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641510311] [2023-11-19 08:00:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:29,987 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 08:00:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:29,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641510311] [2023-11-19 08:00:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641510311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112773487] [2023-11-19 08:00:29,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:00:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:29,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:29,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:00:30,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 08:00:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:30,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:30,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:30,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112773487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:30,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 08:00:30,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706259011] [2023-11-19 08:00:30,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 1055 flow. Second operand has 15 states, 15 states have (on average 73.2) internal successors, (1098), 15 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states 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 08:00:30,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:30,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:30,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:30,859 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-19 08:00:30,859 INFO L125 PetriNetUnfolderBase]: For 3581/3581 co-relation queries the response was YES. [2023-11-19 08:00:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 722 events. 396/722 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3395 event pairs, 28 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4113. Up to 237 conditions per place. [2023-11-19 08:00:30,870 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-19 08:00:30,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 207 transitions, 2348 flow [2023-11-19 08:00:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 08:00:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 08:00:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1736 transitions. [2023-11-19 08:00:30,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42643085237042494 [2023-11-19 08:00:30,876 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1736 transitions. [2023-11-19 08:00:30,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1736 transitions. [2023-11-19 08:00:30,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:30,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1736 transitions. [2023-11-19 08:00:30,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 08:00:30,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states 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 08:00:30,890 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states 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 08:00:30,891 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 1055 flow. Second operand 23 states and 1736 transitions. [2023-11-19 08:00:30,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 207 transitions, 2348 flow [2023-11-19 08:00:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 2206 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:30,919 INFO L231 Difference]: Finished difference. Result has 120 places, 165 transitions, 2030 flow [2023-11-19 08:00:30,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2030, PETRI_PLACES=120, PETRI_TRANSITIONS=165} [2023-11-19 08:00:30,920 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 91 predicate places. [2023-11-19 08:00:30,920 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 165 transitions, 2030 flow [2023-11-19 08:00:30,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.2) internal successors, (1098), 15 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states 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 08:00:30,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:30,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:30,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 08:00:31,143 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 08:00:31,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1340462455, now seen corresponding path program 7 times [2023-11-19 08:00:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088802231] [2023-11-19 08:00:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:31,229 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 08:00:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088802231] [2023-11-19 08:00:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088802231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317968439] [2023-11-19 08:00:31,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:00:31,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:31,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:31,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:00:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:31,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:31,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:31,396 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 08:00:31,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:31,460 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 08:00:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317968439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:31,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:31,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 08:00:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629153207] [2023-11-19 08:00:31,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:31,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:31,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:31,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 165 transitions, 2030 flow. Second operand has 15 states, 15 states have (on average 72.8) internal successors, (1092), 15 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:00:31,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:31,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:31,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:32,035 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-19 08:00:32,036 INFO L125 PetriNetUnfolderBase]: For 6391/6391 co-relation queries the response was YES. [2023-11-19 08:00:32,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5181 conditions, 790 events. 438/790 cut-off events. For 6391/6391 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3716 event pairs, 93 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 5139. Up to 620 conditions per place. [2023-11-19 08:00:32,051 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-11-19 08:00:32,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 225 transitions, 3061 flow [2023-11-19 08:00:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:00:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 08:00:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1368 transitions. [2023-11-19 08:00:32,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293785310734463 [2023-11-19 08:00:32,056 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1368 transitions. [2023-11-19 08:00:32,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1368 transitions. [2023-11-19 08:00:32,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:32,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1368 transitions. [2023-11-19 08:00:32,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.0) internal successors, (1368), 18 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 08:00:32,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 177.0) internal successors, (3363), 19 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states 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 08:00:32,068 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 177.0) internal successors, (3363), 19 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states 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 08:00:32,068 INFO L175 Difference]: Start difference. First operand has 120 places, 165 transitions, 2030 flow. Second operand 18 states and 1368 transitions. [2023-11-19 08:00:32,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 225 transitions, 3061 flow [2023-11-19 08:00:32,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 225 transitions, 2903 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-19 08:00:32,123 INFO L231 Difference]: Finished difference. Result has 141 places, 193 transitions, 2512 flow [2023-11-19 08:00:32,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2512, PETRI_PLACES=141, PETRI_TRANSITIONS=193} [2023-11-19 08:00:32,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2023-11-19 08:00:32,124 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 193 transitions, 2512 flow [2023-11-19 08:00:32,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 72.8) internal successors, (1092), 15 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:00:32,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:32,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:32,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:32,355 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 08:00:32,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2069697323, now seen corresponding path program 8 times [2023-11-19 08:00:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973134648] [2023-11-19 08:00:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:32,462 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 08:00:32,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973134648] [2023-11-19 08:00:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973134648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664938116] [2023-11-19 08:00:32,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:32,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:32,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:32,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:00:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:32,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:32,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:32,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:32,626 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 08:00:32,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:32,676 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 08:00:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664938116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:32,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:32,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 08:00:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626964211] [2023-11-19 08:00:32,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:32,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:32,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:32,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 193 transitions, 2512 flow. Second operand has 13 states, 13 states have (on average 73.0) internal successors, (949), 13 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 08:00:32,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:32,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:32,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:33,112 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-19 08:00:33,113 INFO L125 PetriNetUnfolderBase]: For 9175/9175 co-relation queries the response was YES. [2023-11-19 08:00:33,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5565 conditions, 793 events. 443/793 cut-off events. For 9175/9175 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3724 event pairs, 94 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5510. Up to 645 conditions per place. [2023-11-19 08:00:33,128 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-11-19 08:00:33,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 213 transitions, 3170 flow [2023-11-19 08:00:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:00:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 08:00:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 832 transitions. [2023-11-19 08:00:33,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42732408834103747 [2023-11-19 08:00:33,131 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 832 transitions. [2023-11-19 08:00:33,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 832 transitions. [2023-11-19 08:00:33,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:33,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 832 transitions. [2023-11-19 08:00:33,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:33,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states 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 08:00:33,138 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states 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 08:00:33,138 INFO L175 Difference]: Start difference. First operand has 141 places, 193 transitions, 2512 flow. Second operand 11 states and 832 transitions. [2023-11-19 08:00:33,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 213 transitions, 3170 flow [2023-11-19 08:00:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 213 transitions, 2794 flow, removed 172 selfloop flow, removed 5 redundant places. [2023-11-19 08:00:33,205 INFO L231 Difference]: Finished difference. Result has 147 places, 195 transitions, 2294 flow [2023-11-19 08:00:33,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2294, PETRI_PLACES=147, PETRI_TRANSITIONS=195} [2023-11-19 08:00:33,206 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2023-11-19 08:00:33,206 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 195 transitions, 2294 flow [2023-11-19 08:00:33,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.0) internal successors, (949), 13 states have internal predecessors, (949), 0 states have call successors, (0), 0 states 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 08:00:33,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:33,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:33,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:33,431 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 08:00:33,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash 245973008, now seen corresponding path program 9 times [2023-11-19 08:00:33,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:33,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178317285] [2023-11-19 08:00:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:33,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:33,521 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 08:00:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178317285] [2023-11-19 08:00:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178317285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87751664] [2023-11-19 08:00:33,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:33,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:33,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:00:33,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:00:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:33,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:33,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:33,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87751664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:33,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-19 08:00:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984061644] [2023-11-19 08:00:33,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:00:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:00:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:00:33,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 177 [2023-11-19 08:00:33,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 195 transitions, 2294 flow. Second operand has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 08:00:33,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:33,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 177 [2023-11-19 08:00:33,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:34,164 INFO L124 PetriNetUnfolderBase]: 669/1192 cut-off events. [2023-11-19 08:00:34,165 INFO L125 PetriNetUnfolderBase]: For 11921/11921 co-relation queries the response was YES. [2023-11-19 08:00:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8034 conditions, 1192 events. 669/1192 cut-off events. For 11921/11921 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6188 event pairs, 34 based on Foata normal form. 7/1199 useless extension candidates. Maximal degree in co-relation 7978. Up to 630 conditions per place. [2023-11-19 08:00:34,187 INFO L140 encePairwiseOnDemand]: 173/177 looper letters, 200 selfloop transitions, 81 changer transitions 48/329 dead transitions. [2023-11-19 08:00:34,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 329 transitions, 4450 flow [2023-11-19 08:00:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 461 transitions. [2023-11-19 08:00:34,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209039548022599 [2023-11-19 08:00:34,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 461 transitions. [2023-11-19 08:00:34,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 461 transitions. [2023-11-19 08:00:34,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:34,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 461 transitions. [2023-11-19 08:00:34,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 08:00:34,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:34,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 08:00:34,194 INFO L175 Difference]: Start difference. First operand has 147 places, 195 transitions, 2294 flow. Second operand 5 states and 461 transitions. [2023-11-19 08:00:34,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 329 transitions, 4450 flow [2023-11-19 08:00:34,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 329 transitions, 4351 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:34,281 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 3111 flow [2023-11-19 08:00:34,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3111, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2023-11-19 08:00:34,282 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-11-19 08:00:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 3111 flow [2023-11-19 08:00:34,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 08:00:34,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:34,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:34,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:34,494 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 08:00:34,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2051291043, now seen corresponding path program 10 times [2023-11-19 08:00:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:34,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254659247] [2023-11-19 08:00:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:34,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:34,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254659247] [2023-11-19 08:00:34,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254659247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75749278] [2023-11-19 08:00:34,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:34,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:34,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:34,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:00:34,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:34,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:34,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:34,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75749278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:34,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-19 08:00:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565738001] [2023-11-19 08:00:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:00:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:00:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:00:34,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:34,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 3111 flow. Second operand has 14 states, 14 states have (on average 73.0) internal successors, (1022), 14 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states 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 08:00:34,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:34,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:34,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:35,617 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-19 08:00:35,617 INFO L125 PetriNetUnfolderBase]: For 17268/17268 co-relation queries the response was YES. [2023-11-19 08:00:35,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10327 conditions, 1418 events. 775/1418 cut-off events. For 17268/17268 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7912 event pairs, 27 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10268. Up to 564 conditions per place. [2023-11-19 08:00:35,671 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-19 08:00:35,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 364 transitions, 5279 flow [2023-11-19 08:00:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:00:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:00:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 997 transitions. [2023-11-19 08:00:35,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332898739678401 [2023-11-19 08:00:35,675 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 997 transitions. [2023-11-19 08:00:35,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 997 transitions. [2023-11-19 08:00:35,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:35,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 997 transitions. [2023-11-19 08:00:35,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.6923076923077) internal successors, (997), 13 states have internal predecessors, (997), 0 states have call successors, (0), 0 states 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 08:00:35,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 177.0) internal successors, (2478), 14 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 08:00:35,683 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 177.0) internal successors, (2478), 14 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 08:00:35,683 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 3111 flow. Second operand 13 states and 997 transitions. [2023-11-19 08:00:35,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 364 transitions, 5279 flow [2023-11-19 08:00:35,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 364 transitions, 5173 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:35,800 INFO L231 Difference]: Finished difference. Result has 169 places, 303 transitions, 4453 flow [2023-11-19 08:00:35,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4453, PETRI_PLACES=169, PETRI_TRANSITIONS=303} [2023-11-19 08:00:35,802 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-11-19 08:00:35,802 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 303 transitions, 4453 flow [2023-11-19 08:00:35,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.0) internal successors, (1022), 14 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states 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 08:00:35,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:35,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:35,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:36,017 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 08:00:36,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1554170529, now seen corresponding path program 11 times [2023-11-19 08:00:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:36,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17137745] [2023-11-19 08:00:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:36,131 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 08:00:36,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17137745] [2023-11-19 08:00:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17137745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826038428] [2023-11-19 08:00:36,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:36,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:36,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:36,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:36,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:00:36,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-19 08:00:36,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:36,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:36,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:36,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826038428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:36,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:36,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 08:00:36,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869205959] [2023-11-19 08:00:36,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:36,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:36,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 303 transitions, 4453 flow. Second operand has 15 states, 15 states have (on average 72.8) internal successors, (1092), 15 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:00:36,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:36,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:36,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:37,163 INFO L124 PetriNetUnfolderBase]: 897/1560 cut-off events. [2023-11-19 08:00:37,163 INFO L125 PetriNetUnfolderBase]: For 22990/22990 co-relation queries the response was YES. [2023-11-19 08:00:37,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12825 conditions, 1560 events. 897/1560 cut-off events. For 22990/22990 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8412 event pairs, 118 based on Foata normal form. 18/1578 useless extension candidates. Maximal degree in co-relation 12757. Up to 786 conditions per place. [2023-11-19 08:00:37,199 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 163 selfloop transitions, 236 changer transitions 6/405 dead transitions. [2023-11-19 08:00:37,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 405 transitions, 6892 flow [2023-11-19 08:00:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:00:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 08:00:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1436 transitions. [2023-11-19 08:00:37,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269997026464466 [2023-11-19 08:00:37,203 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1436 transitions. [2023-11-19 08:00:37,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1436 transitions. [2023-11-19 08:00:37,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:37,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1436 transitions. [2023-11-19 08:00:37,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states 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 08:00:37,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 177.0) internal successors, (3540), 20 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states 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 08:00:37,213 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 177.0) internal successors, (3540), 20 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states 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 08:00:37,213 INFO L175 Difference]: Start difference. First operand has 169 places, 303 transitions, 4453 flow. Second operand 19 states and 1436 transitions. [2023-11-19 08:00:37,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 405 transitions, 6892 flow [2023-11-19 08:00:37,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 405 transitions, 6753 flow, removed 61 selfloop flow, removed 3 redundant places. [2023-11-19 08:00:37,408 INFO L231 Difference]: Finished difference. Result has 190 places, 366 transitions, 6226 flow [2023-11-19 08:00:37,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6226, PETRI_PLACES=190, PETRI_TRANSITIONS=366} [2023-11-19 08:00:37,409 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2023-11-19 08:00:37,409 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 366 transitions, 6226 flow [2023-11-19 08:00:37,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 72.8) internal successors, (1092), 15 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 08:00:37,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:37,410 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:37,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:37,629 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 08:00:37,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 692669781, now seen corresponding path program 12 times [2023-11-19 08:00:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514669468] [2023-11-19 08:00:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:37,745 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 08:00:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514669468] [2023-11-19 08:00:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514669468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654020964] [2023-11-19 08:00:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:00:37,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:37,747 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:37,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 08:00:37,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 08:00:37,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:37,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:37,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:37,935 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 08:00:37,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654020964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:38,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:38,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 08:00:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264699517] [2023-11-19 08:00:38,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:38,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:38,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:38,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 366 transitions, 6226 flow. Second operand has 15 states, 15 states have (on average 73.06666666666666) internal successors, (1096), 15 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 08:00:38,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:38,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:38,962 INFO L124 PetriNetUnfolderBase]: 1009/1776 cut-off events. [2023-11-19 08:00:38,963 INFO L125 PetriNetUnfolderBase]: For 35035/35035 co-relation queries the response was YES. [2023-11-19 08:00:38,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15753 conditions, 1776 events. 1009/1776 cut-off events. For 35035/35035 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9900 event pairs, 66 based on Foata normal form. 48/1824 useless extension candidates. Maximal degree in co-relation 15679. Up to 483 conditions per place. [2023-11-19 08:00:39,010 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 210 selfloop transitions, 249 changer transitions 7/466 dead transitions. [2023-11-19 08:00:39,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 466 transitions, 8540 flow [2023-11-19 08:00:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:00:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 08:00:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1595 transitions. [2023-11-19 08:00:39,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42910949690610706 [2023-11-19 08:00:39,017 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1595 transitions. [2023-11-19 08:00:39,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1595 transitions. [2023-11-19 08:00:39,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:39,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1595 transitions. [2023-11-19 08:00:39,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.95238095238095) internal successors, (1595), 21 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states 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 08:00:39,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 177.0) internal successors, (3894), 22 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states 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 08:00:39,034 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 177.0) internal successors, (3894), 22 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states 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 08:00:39,034 INFO L175 Difference]: Start difference. First operand has 190 places, 366 transitions, 6226 flow. Second operand 21 states and 1595 transitions. [2023-11-19 08:00:39,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 466 transitions, 8540 flow [2023-11-19 08:00:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 466 transitions, 7377 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-11-19 08:00:39,221 INFO L231 Difference]: Finished difference. Result has 207 places, 413 transitions, 6806 flow [2023-11-19 08:00:39,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6806, PETRI_PLACES=207, PETRI_TRANSITIONS=413} [2023-11-19 08:00:39,222 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-11-19 08:00:39,223 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 413 transitions, 6806 flow [2023-11-19 08:00:39,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.06666666666666) internal successors, (1096), 15 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 08:00:39,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:39,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:39,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:39,434 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 08:00:39,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash -796735215, now seen corresponding path program 13 times [2023-11-19 08:00:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289962304] [2023-11-19 08:00:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:39,572 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 08:00:39,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289962304] [2023-11-19 08:00:39,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289962304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699429976] [2023-11-19 08:00:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:00:39,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:39,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:39,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 08:00:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:39,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:39,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:39,774 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 08:00:39,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699429976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:39,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 08:00:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024065617] [2023-11-19 08:00:39,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:39,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:39,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 413 transitions, 6806 flow. Second operand has 15 states, 15 states have (on average 73.06666666666666) internal successors, (1096), 15 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 08:00:39,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:39,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:39,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:40,872 INFO L124 PetriNetUnfolderBase]: 1011/1816 cut-off events. [2023-11-19 08:00:40,872 INFO L125 PetriNetUnfolderBase]: For 39426/39426 co-relation queries the response was YES. [2023-11-19 08:00:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15617 conditions, 1816 events. 1011/1816 cut-off events. For 39426/39426 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10416 event pairs, 61 based on Foata normal form. 38/1854 useless extension candidates. Maximal degree in co-relation 15539. Up to 631 conditions per place. [2023-11-19 08:00:40,900 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 136 selfloop transitions, 329 changer transitions 1/466 dead transitions. [2023-11-19 08:00:40,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 466 transitions, 8341 flow [2023-11-19 08:00:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:00:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 08:00:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1814 transitions. [2023-11-19 08:00:40,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270244821092279 [2023-11-19 08:00:40,906 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1814 transitions. [2023-11-19 08:00:40,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1814 transitions. [2023-11-19 08:00:40,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:40,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1814 transitions. [2023-11-19 08:00:40,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.58333333333333) internal successors, (1814), 24 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states 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 08:00:40,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 177.0) internal successors, (4425), 25 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states 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 08:00:40,920 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 177.0) internal successors, (4425), 25 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states 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 08:00:40,920 INFO L175 Difference]: Start difference. First operand has 207 places, 413 transitions, 6806 flow. Second operand 24 states and 1814 transitions. [2023-11-19 08:00:40,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 466 transitions, 8341 flow [2023-11-19 08:00:41,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 466 transitions, 8028 flow, removed 100 selfloop flow, removed 10 redundant places. [2023-11-19 08:00:41,154 INFO L231 Difference]: Finished difference. Result has 221 places, 423 transitions, 7498 flow [2023-11-19 08:00:41,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7498, PETRI_PLACES=221, PETRI_TRANSITIONS=423} [2023-11-19 08:00:41,155 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2023-11-19 08:00:41,155 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 423 transitions, 7498 flow [2023-11-19 08:00:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.06666666666666) internal successors, (1096), 15 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 08:00:41,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:41,156 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:41,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:41,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 08:00:41,370 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 08:00:41,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1889732717, now seen corresponding path program 14 times [2023-11-19 08:00:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020858074] [2023-11-19 08:00:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:41,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:41,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020858074] [2023-11-19 08:00:41,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020858074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:41,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497446898] [2023-11-19 08:00:41,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:41,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:41,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:41,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 08:00:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:41,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:41,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:41,690 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 08:00:41,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497446898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:41,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-19 08:00:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372807518] [2023-11-19 08:00:41,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 08:00:41,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:00:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:00:41,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:41,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 423 transitions, 7498 flow. Second operand has 16 states, 16 states have (on average 73.0625) internal successors, (1169), 16 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states 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 08:00:41,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:41,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:42,753 INFO L124 PetriNetUnfolderBase]: 1081/1944 cut-off events. [2023-11-19 08:00:42,754 INFO L125 PetriNetUnfolderBase]: For 39324/39324 co-relation queries the response was YES. [2023-11-19 08:00:42,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17394 conditions, 1944 events. 1081/1944 cut-off events. For 39324/39324 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11355 event pairs, 112 based on Foata normal form. 10/1954 useless extension candidates. Maximal degree in co-relation 17315. Up to 766 conditions per place. [2023-11-19 08:00:42,779 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 292 selfloop transitions, 205 changer transitions 0/497 dead transitions. [2023-11-19 08:00:42,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 497 transitions, 9409 flow [2023-11-19 08:00:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:00:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 08:00:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1440 transitions. [2023-11-19 08:00:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281891168599465 [2023-11-19 08:00:42,795 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1440 transitions. [2023-11-19 08:00:42,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1440 transitions. [2023-11-19 08:00:42,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:42,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1440 transitions. [2023-11-19 08:00:42,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 75.78947368421052) internal successors, (1440), 19 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 08:00:42,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 177.0) internal successors, (3540), 20 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states 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 08:00:42,811 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 177.0) internal successors, (3540), 20 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states 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 08:00:42,811 INFO L175 Difference]: Start difference. First operand has 221 places, 423 transitions, 7498 flow. Second operand 19 states and 1440 transitions. [2023-11-19 08:00:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 497 transitions, 9409 flow [2023-11-19 08:00:43,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 497 transitions, 8791 flow, removed 62 selfloop flow, removed 20 redundant places. [2023-11-19 08:00:43,102 INFO L231 Difference]: Finished difference. Result has 223 places, 450 transitions, 7951 flow [2023-11-19 08:00:43,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7951, PETRI_PLACES=223, PETRI_TRANSITIONS=450} [2023-11-19 08:00:43,103 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2023-11-19 08:00:43,104 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 450 transitions, 7951 flow [2023-11-19 08:00:43,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 73.0625) internal successors, (1169), 16 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states 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 08:00:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:43,104 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:43,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:43,325 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 08:00:43,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash -5919881, now seen corresponding path program 15 times [2023-11-19 08:00:43,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:43,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231082403] [2023-11-19 08:00:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231082403] [2023-11-19 08:00:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231082403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598539879] [2023-11-19 08:00:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:43,435 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:43,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 08:00:43,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:00:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:43,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:43,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:43,646 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 08:00:43,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598539879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:43,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-19 08:00:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090898283] [2023-11-19 08:00:43,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:43,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:00:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:00:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:00:43,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:43,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 450 transitions, 7951 flow. Second operand has 15 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states 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 08:00:43,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:43,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:43,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:45,056 INFO L124 PetriNetUnfolderBase]: 1463/2612 cut-off events. [2023-11-19 08:00:45,056 INFO L125 PetriNetUnfolderBase]: For 54373/54373 co-relation queries the response was YES. [2023-11-19 08:00:45,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23606 conditions, 2612 events. 1463/2612 cut-off events. For 54373/54373 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 16077 event pairs, 63 based on Foata normal form. 34/2646 useless extension candidates. Maximal degree in co-relation 23523. Up to 677 conditions per place. [2023-11-19 08:00:45,097 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 171 selfloop transitions, 486 changer transitions 7/664 dead transitions. [2023-11-19 08:00:45,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 664 transitions, 12747 flow [2023-11-19 08:00:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 08:00:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 08:00:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1961 transitions. [2023-11-19 08:00:45,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42611907866145154 [2023-11-19 08:00:45,103 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1961 transitions. [2023-11-19 08:00:45,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1961 transitions. [2023-11-19 08:00:45,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:45,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1961 transitions. [2023-11-19 08:00:45,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 75.42307692307692) internal successors, (1961), 26 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 08:00:45,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states 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 08:00:45,124 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states 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 08:00:45,124 INFO L175 Difference]: Start difference. First operand has 223 places, 450 transitions, 7951 flow. Second operand 26 states and 1961 transitions. [2023-11-19 08:00:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 664 transitions, 12747 flow [2023-11-19 08:00:45,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 664 transitions, 12471 flow, removed 85 selfloop flow, removed 8 redundant places. [2023-11-19 08:00:45,547 INFO L231 Difference]: Finished difference. Result has 250 places, 612 transitions, 12232 flow [2023-11-19 08:00:45,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=7720, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12232, PETRI_PLACES=250, PETRI_TRANSITIONS=612} [2023-11-19 08:00:45,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2023-11-19 08:00:45,548 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 612 transitions, 12232 flow [2023-11-19 08:00:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states 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 08:00:45,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:45,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:45,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:45,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1214764209, now seen corresponding path program 16 times [2023-11-19 08:00:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828930883] [2023-11-19 08:00:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:45,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828930883] [2023-11-19 08:00:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828930883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959483094] [2023-11-19 08:00:45,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:45,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:45,879 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 08:00:45,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:45,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:45,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:46,074 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 08:00:46,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959483094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:46,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:46,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-19 08:00:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996124618] [2023-11-19 08:00:46,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:00:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:00:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:00:46,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:46,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 612 transitions, 12232 flow. Second operand has 18 states, 18 states have (on average 72.94444444444444) internal successors, (1313), 18 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 08:00:46,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:46,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:46,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:47,911 INFO L124 PetriNetUnfolderBase]: 1640/2941 cut-off events. [2023-11-19 08:00:47,911 INFO L125 PetriNetUnfolderBase]: For 71328/71328 co-relation queries the response was YES. [2023-11-19 08:00:47,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29264 conditions, 2941 events. 1640/2941 cut-off events. For 71328/71328 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18778 event pairs, 142 based on Foata normal form. 10/2951 useless extension candidates. Maximal degree in co-relation 29171. Up to 1030 conditions per place. [2023-11-19 08:00:47,952 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 383 selfloop transitions, 369 changer transitions 2/754 dead transitions. [2023-11-19 08:00:47,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 754 transitions, 16126 flow [2023-11-19 08:00:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 08:00:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 08:00:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2188 transitions. [2023-11-19 08:00:47,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262614455484122 [2023-11-19 08:00:47,956 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2188 transitions. [2023-11-19 08:00:47,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2188 transitions. [2023-11-19 08:00:47,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:47,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2188 transitions. [2023-11-19 08:00:47,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 75.44827586206897) internal successors, (2188), 29 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states 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 08:00:47,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 177.0) internal successors, (5310), 30 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states 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 08:00:47,970 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 177.0) internal successors, (5310), 30 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states 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 08:00:47,970 INFO L175 Difference]: Start difference. First operand has 250 places, 612 transitions, 12232 flow. Second operand 29 states and 2188 transitions. [2023-11-19 08:00:47,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 754 transitions, 16126 flow [2023-11-19 08:00:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 754 transitions, 15380 flow, removed 289 selfloop flow, removed 10 redundant places. [2023-11-19 08:00:48,656 INFO L231 Difference]: Finished difference. Result has 273 places, 693 transitions, 14291 flow [2023-11-19 08:00:48,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=11578, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14291, PETRI_PLACES=273, PETRI_TRANSITIONS=693} [2023-11-19 08:00:48,657 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 244 predicate places. [2023-11-19 08:00:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 693 transitions, 14291 flow [2023-11-19 08:00:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 72.94444444444444) internal successors, (1313), 18 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 08:00:48,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:48,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:48,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-19 08:00:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-19 08:00:48,865 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:48,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash 498969345, now seen corresponding path program 17 times [2023-11-19 08:00:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019812813] [2023-11-19 08:00:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:48,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019812813] [2023-11-19 08:00:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019812813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929538306] [2023-11-19 08:00:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:48,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:49,000 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:49,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 08:00:49,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 08:00:49,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:49,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:49,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:49,212 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 08:00:49,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:49,300 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 08:00:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929538306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:49,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:49,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 08:00:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715794533] [2023-11-19 08:00:49,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:00:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:00:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:00:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:49,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 693 transitions, 14291 flow. Second operand has 20 states, 20 states have (on average 72.9) internal successors, (1458), 20 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 08:00:49,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:49,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:51,876 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-19 08:00:51,876 INFO L125 PetriNetUnfolderBase]: For 111034/111034 co-relation queries the response was YES. [2023-11-19 08:00:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44057 conditions, 4340 events. 2423/4340 cut-off events. For 111034/111034 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29654 event pairs, 139 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 43959. Up to 1197 conditions per place. [2023-11-19 08:00:52,029 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-11-19 08:00:52,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1094 transitions, 24580 flow [2023-11-19 08:00:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 08:00:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-19 08:00:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2713 transitions. [2023-11-19 08:00:52,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42576898932831136 [2023-11-19 08:00:52,034 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2713 transitions. [2023-11-19 08:00:52,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2713 transitions. [2023-11-19 08:00:52,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:52,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2713 transitions. [2023-11-19 08:00:52,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 75.36111111111111) internal successors, (2713), 36 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states 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 08:00:52,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 177.0) internal successors, (6549), 37 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states 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 08:00:52,048 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 177.0) internal successors, (6549), 37 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states 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 08:00:52,049 INFO L175 Difference]: Start difference. First operand has 273 places, 693 transitions, 14291 flow. Second operand 36 states and 2713 transitions. [2023-11-19 08:00:52,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1094 transitions, 24580 flow [2023-11-19 08:00:52,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1094 transitions, 24001 flow, removed 252 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:52,993 INFO L231 Difference]: Finished difference. Result has 316 places, 1021 transitions, 23867 flow [2023-11-19 08:00:52,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=13978, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23867, PETRI_PLACES=316, PETRI_TRANSITIONS=1021} [2023-11-19 08:00:52,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2023-11-19 08:00:52,995 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1021 transitions, 23867 flow [2023-11-19 08:00:52,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 72.9) internal successors, (1458), 20 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 08:00:52,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:52,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:53,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:53,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-19 08:00:53,217 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:53,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1067760039, now seen corresponding path program 18 times [2023-11-19 08:00:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:53,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119505728] [2023-11-19 08:00:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119505728] [2023-11-19 08:00:53,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119505728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926875003] [2023-11-19 08:00:53,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:00:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:53,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:53,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 08:00:53,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 08:00:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:53,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:53,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:53,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926875003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:53,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 08:00:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541532401] [2023-11-19 08:00:53,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:00:53,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:00:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:00:53,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:53,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1021 transitions, 23867 flow. Second operand has 20 states, 20 states have (on average 72.6) internal successors, (1452), 20 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 08:00:53,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:53,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:56,406 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-19 08:00:56,406 INFO L125 PetriNetUnfolderBase]: For 140918/140918 co-relation queries the response was YES. [2023-11-19 08:00:56,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48984 conditions, 4449 events. 2490/4449 cut-off events. For 140918/140918 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30246 event pairs, 693 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 48873. Up to 3951 conditions per place. [2023-11-19 08:00:56,466 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-11-19 08:00:56,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1136 transitions, 28313 flow [2023-11-19 08:00:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 08:00:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 08:00:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2272 transitions. [2023-11-19 08:00:56,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278719397363465 [2023-11-19 08:00:56,471 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2272 transitions. [2023-11-19 08:00:56,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2272 transitions. [2023-11-19 08:00:56,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:56,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2272 transitions. [2023-11-19 08:00:56,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 75.73333333333333) internal successors, (2272), 30 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states 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 08:00:56,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 177.0) internal successors, (5487), 31 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states 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 08:00:56,483 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 177.0) internal successors, (5487), 31 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states 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 08:00:56,484 INFO L175 Difference]: Start difference. First operand has 316 places, 1021 transitions, 23867 flow. Second operand 30 states and 2272 transitions. [2023-11-19 08:00:56,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1136 transitions, 28313 flow [2023-11-19 08:00:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1136 transitions, 27705 flow, removed 258 selfloop flow, removed 10 redundant places. [2023-11-19 08:00:58,220 INFO L231 Difference]: Finished difference. Result has 352 places, 1077 transitions, 25593 flow [2023-11-19 08:00:58,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=23273, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25593, PETRI_PLACES=352, PETRI_TRANSITIONS=1077} [2023-11-19 08:00:58,222 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 323 predicate places. [2023-11-19 08:00:58,222 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1077 transitions, 25593 flow [2023-11-19 08:00:58,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 72.6) internal successors, (1452), 20 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 08:00:58,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:58,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:58,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:58,423 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:00:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -497586441, now seen corresponding path program 19 times [2023-11-19 08:00:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937105584] [2023-11-19 08:00:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:58,529 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 08:00:58,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:58,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937105584] [2023-11-19 08:00:58,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937105584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:58,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225935694] [2023-11-19 08:00:58,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:00:58,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:58,531 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:58,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 08:00:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:58,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:58,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:58,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225935694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:58,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-19 08:00:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268002072] [2023-11-19 08:00:58,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 08:00:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 08:00:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:00:58,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 177 [2023-11-19 08:00:58,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1077 transitions, 25593 flow. Second operand has 17 states, 17 states have (on average 72.82352941176471) internal successors, (1238), 17 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states 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 08:00:58,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:58,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 177 [2023-11-19 08:00:58,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:01,647 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-19 08:01:01,647 INFO L125 PetriNetUnfolderBase]: For 135779/135779 co-relation queries the response was YES. [2023-11-19 08:01:01,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48236 conditions, 4434 events. 2496/4434 cut-off events. For 135779/135779 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29943 event pairs, 706 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 48107. Up to 4069 conditions per place. [2023-11-19 08:01:01,707 INFO L140 encePairwiseOnDemand]: 171/177 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-11-19 08:01:01,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1115 transitions, 28420 flow [2023-11-19 08:01:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:01:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:01:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1206 transitions. [2023-11-19 08:01:01,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258474576271186 [2023-11-19 08:01:01,710 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1206 transitions. [2023-11-19 08:01:01,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1206 transitions. [2023-11-19 08:01:01,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:01,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1206 transitions. [2023-11-19 08:01:01,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 75.375) internal successors, (1206), 16 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 08:01:01,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 177.0) internal successors, (3009), 17 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states 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 08:01:01,716 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 177.0) internal successors, (3009), 17 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states 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 08:01:01,716 INFO L175 Difference]: Start difference. First operand has 352 places, 1077 transitions, 25593 flow. Second operand 16 states and 1206 transitions. [2023-11-19 08:01:01,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1115 transitions, 28420 flow [2023-11-19 08:01:03,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1115 transitions, 26833 flow, removed 764 selfloop flow, removed 7 redundant places. [2023-11-19 08:01:03,657 INFO L231 Difference]: Finished difference. Result has 360 places, 1090 transitions, 24703 flow [2023-11-19 08:01:03,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=24130, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24703, PETRI_PLACES=360, PETRI_TRANSITIONS=1090} [2023-11-19 08:01:03,659 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 331 predicate places. [2023-11-19 08:01:03,659 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1090 transitions, 24703 flow [2023-11-19 08:01:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 72.82352941176471) internal successors, (1238), 17 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states 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 08:01:03,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:03,660 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:03,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-19 08:01:03,875 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:01:03,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash 410615724, now seen corresponding path program 20 times [2023-11-19 08:01:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907343481] [2023-11-19 08:01:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:04,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907343481] [2023-11-19 08:01:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907343481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553833482] [2023-11-19 08:01:04,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:04,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:04,027 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:04,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a110849-ece2-4ea2-b2e2-f4493c23527e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 08:01:04,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:04,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:01:04,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:04,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553833482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:04,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2023-11-19 08:01:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387363091] [2023-11-19 08:01:04,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:01:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:01:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:01:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 177 [2023-11-19 08:01:04,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1090 transitions, 24703 flow. Second operand has 10 states, 10 states have (on average 85.2) internal successors, (852), 10 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 08:01:04,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:04,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 177 [2023-11-19 08:01:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:07,709 INFO L124 PetriNetUnfolderBase]: 3371/5946 cut-off events. [2023-11-19 08:01:07,710 INFO L125 PetriNetUnfolderBase]: For 152517/152517 co-relation queries the response was YES. [2023-11-19 08:01:07,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61501 conditions, 5946 events. 3371/5946 cut-off events. For 152517/152517 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42139 event pairs, 157 based on Foata normal form. 7/5953 useless extension candidates. Maximal degree in co-relation 61370. Up to 3556 conditions per place. [2023-11-19 08:01:07,789 INFO L140 encePairwiseOnDemand]: 173/177 looper letters, 1003 selfloop transitions, 448 changer transitions 134/1585 dead transitions. [2023-11-19 08:01:07,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1585 transitions, 38381 flow [2023-11-19 08:01:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:01:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 555 transitions. [2023-11-19 08:01:07,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225988700564972 [2023-11-19 08:01:07,791 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 555 transitions. [2023-11-19 08:01:07,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 555 transitions. [2023-11-19 08:01:07,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:07,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 555 transitions. [2023-11-19 08:01:07,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.5) internal successors, (555), 6 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:07,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:07,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:07,793 INFO L175 Difference]: Start difference. First operand has 360 places, 1090 transitions, 24703 flow. Second operand 6 states and 555 transitions. [2023-11-19 08:01:07,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1585 transitions, 38381 flow