./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:56:08,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:56:09,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:56:09,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:56:09,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:56:09,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:56:09,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:56:09,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:56:09,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:56:09,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:56:09,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:56:09,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:56:09,130 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:56:09,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:56:09,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:56:09,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:56:09,133 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:56:09,133 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:56:09,134 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:56:09,134 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:56:09,135 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:56:09,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:56:09,136 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:56:09,137 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:56:09,138 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:56:09,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:56:09,139 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:56:09,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:56:09,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:56:09,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:56:09,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:56:09,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:56:09,142 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:56:09,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:56:09,142 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:56:09,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:56:09,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:56:09,143 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:56:09,143 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_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2023-11-06 21:56:09,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:56:09,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:56:09,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:56:09,483 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:56:09,483 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:56:09,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-06 21:56:12,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:56:12,821 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:56:12,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-06 21:56:12,831 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/data/1c6c4afd5/433641135d1145eba76d04678a598a7e/FLAG376bee74e [2023-11-06 21:56:12,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/data/1c6c4afd5/433641135d1145eba76d04678a598a7e [2023-11-06 21:56:12,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:56:12,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:56:12,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:56:12,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:56:12,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:56:12,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:56:12" (1/1) ... [2023-11-06 21:56:12,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282e7fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:12, skipping insertion in model container [2023-11-06 21:56:12,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:56:12" (1/1) ... [2023-11-06 21:56:12,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:56:13,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:56:13,143 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:56:13,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:56:13,176 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:56:13,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13 WrapperNode [2023-11-06 21:56:13,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:56:13,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:56:13,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:56:13,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:56:13,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,194 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,228 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2023-11-06 21:56:13,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:56:13,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:56:13,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:56:13,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:56:13,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,241 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,253 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,255 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:56:13,256 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:56:13,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:56:13,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:56:13,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (1/1) ... [2023-11-06 21:56:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:56:13,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:13,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:56:13,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:56:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:56:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:56:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:56:13,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:56:13,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:56:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:56:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:56:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:56:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:56:13,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:56:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:56:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:56:13,367 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:56:13,531 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:56:13,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:56:13,743 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:56:13,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:56:13,752 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:56:13,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:56:13 BoogieIcfgContainer [2023-11-06 21:56:13,755 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:56:13,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:56:13,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:56:13,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:56:13,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:56:12" (1/3) ... [2023-11-06 21:56:13,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ed65e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:56:13, skipping insertion in model container [2023-11-06 21:56:13,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:13" (2/3) ... [2023-11-06 21:56:13,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ed65e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:56:13, skipping insertion in model container [2023-11-06 21:56:13,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:56:13" (3/3) ... [2023-11-06 21:56:13,766 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-06 21:56:13,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:56:13,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 21:56:13,788 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:56:13,867 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:56:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 95 transitions, 204 flow [2023-11-06 21:56:13,962 INFO L124 PetriNetUnfolderBase]: 5/93 cut-off events. [2023-11-06 21:56:13,962 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:56:13,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 5/93 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. 0/78 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-06 21:56:13,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 95 transitions, 204 flow [2023-11-06 21:56:13,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 88 transitions, 188 flow [2023-11-06 21:56:13,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:56:13,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 88 transitions, 188 flow [2023-11-06 21:56:13,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 88 transitions, 188 flow [2023-11-06 21:56:13,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 188 flow [2023-11-06 21:56:14,020 INFO L124 PetriNetUnfolderBase]: 5/88 cut-off events. [2023-11-06 21:56:14,020 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:56:14,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 5/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-06 21:56:14,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-11-06 21:56:17,132 INFO L134 LiptonReduction]: Checked pairs total: 715 [2023-11-06 21:56:17,133 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-06 21:56:17,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:56:17,155 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;@3a03cbf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:56:17,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-06 21:56:17,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:56:17,157 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 21:56:17,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:56:17,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:17,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 21:56:17,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:56:17,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:17,165 INFO L85 PathProgramCache]: Analyzing trace with hash 354, now seen corresponding path program 1 times [2023-11-06 21:56:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:17,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855663015] [2023-11-06 21:56:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:17,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855663015] [2023-11-06 21:56:17,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855663015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:17,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:17,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 21:56:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505115596] [2023-11-06 21:56:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:56:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:56:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:56:17,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 181 [2023-11-06 21:56:17,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:17,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 181 [2023-11-06 21:56:17,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:17,428 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-11-06 21:56:17,428 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 21:56:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 505 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-11-06 21:56:17,434 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-06 21:56:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-06 21:56:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:56:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 21:56:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-11-06 21:56:17,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-11-06 21:56:17,453 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-11-06 21:56:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-11-06 21:56:17,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:17,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-11-06 21:56:17,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,475 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,477 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 196 transitions. [2023-11-06 21:56:17,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-06 21:56:17,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:56:17,483 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-06 21:56:17,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-11-06 21:56:17,491 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 21:56:17,491 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-06 21:56:17,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:17,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:56:17,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:56:17,493 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)] === [2023-11-06 21:56:17,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash 348721, now seen corresponding path program 1 times [2023-11-06 21:56:17,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:17,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605668855] [2023-11-06 21:56:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605668855] [2023-11-06 21:56:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605668855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:56:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340247608] [2023-11-06 21:56:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:17,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:17,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:17,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:56:17,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-11-06 21:56:17,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:17,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-11-06 21:56:17,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:17,852 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-11-06 21:56:17,852 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:56:17,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 458 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-11-06 21:56:17,854 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 21:56:17,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-06 21:56:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:56:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-06 21:56:17,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604051565377532 [2023-11-06 21:56:17,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-06 21:56:17,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-06 21:56:17,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:17,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-06 21:56:17,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,863 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 250 transitions. [2023-11-06 21:56:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-06 21:56:17,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:56:17,864 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-06 21:56:17,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-11-06 21:56:17,865 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 21:56:17,866 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-06 21:56:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:17,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:56:17,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:56:17,867 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)] === [2023-11-06 21:56:17,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash 348722, now seen corresponding path program 1 times [2023-11-06 21:56:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:17,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476641439] [2023-11-06 21:56:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:17,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476641439] [2023-11-06 21:56:17,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476641439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:17,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:17,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:56:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463446786] [2023-11-06 21:56:17,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:17,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:56:18,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 181 [2023-11-06 21:56:18,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:18,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 181 [2023-11-06 21:56:18,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:18,077 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-11-06 21:56:18,077 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:56:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-11-06 21:56:18,080 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-06 21:56:18,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-06 21:56:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:56:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-11-06 21:56:18,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47882136279926335 [2023-11-06 21:56:18,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-11-06 21:56:18,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-11-06 21:56:18,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:18,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-11-06 21:56:18,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,088 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 260 transitions. [2023-11-06 21:56:18,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-06 21:56:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:56:18,089 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-06 21:56:18,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-11-06 21:56:18,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:56:18,091 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-06 21:56:18,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:18,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:56:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:56:18,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:56:18,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 335127529, now seen corresponding path program 1 times [2023-11-06 21:56:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:18,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967629289] [2023-11-06 21:56:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967629289] [2023-11-06 21:56:18,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967629289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:18,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:56:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026889290] [2023-11-06 21:56:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:18,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:56:18,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-11-06 21:56:18,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:18,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-11-06 21:56:18,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:18,228 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-11-06 21:56:18,228 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:56:18,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 281 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-11-06 21:56:18,233 INFO L140 encePairwiseOnDemand]: 179/181 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-06 21:56:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-06 21:56:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:56:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-06 21:56:18,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585635359116022 [2023-11-06 21:56:18,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-06 21:56:18,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-06 21:56:18,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:18,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-06 21:56:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,242 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 249 transitions. [2023-11-06 21:56:18,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-06 21:56:18,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:56:18,244 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-06 21:56:18,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-11-06 21:56:18,247 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:56:18,247 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-06 21:56:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:18,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:56:18,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:56:18,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:56:18,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:18,249 INFO L85 PathProgramCache]: Analyzing trace with hash 335127528, now seen corresponding path program 1 times [2023-11-06 21:56:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:18,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351908371] [2023-11-06 21:56:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:18,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351908371] [2023-11-06 21:56:18,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351908371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:18,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:18,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:56:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136588348] [2023-11-06 21:56:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:18,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:56:18,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:56:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:56:18,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 181 [2023-11-06 21:56:18,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:18,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 181 [2023-11-06 21:56:18,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:18,480 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-11-06 21:56:18,480 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:56:18,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-11-06 21:56:18,482 INFO L140 encePairwiseOnDemand]: 179/181 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-06 21:56:18,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-06 21:56:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:56:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-11-06 21:56:18,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429097605893186 [2023-11-06 21:56:18,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-11-06 21:56:18,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-11-06 21:56:18,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:18,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-11-06 21:56:18,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,495 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 233 transitions. [2023-11-06 21:56:18,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-06 21:56:18,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:56:18,496 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-06 21:56:18,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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} [2023-11-06 21:56:18,499 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:56:18,500 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-06 21:56:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:18,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:18,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:56:18,501 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)] === [2023-11-06 21:56:18,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1524926422, now seen corresponding path program 1 times [2023-11-06 21:56:18,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:18,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896513557] [2023-11-06 21:56:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:18,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:18,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896513557] [2023-11-06 21:56:18,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896513557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:18,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:18,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:56:18,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188268220] [2023-11-06 21:56:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:18,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:18,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:18,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:56:18,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 181 [2023-11-06 21:56:18,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:18,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 181 [2023-11-06 21:56:18,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:18,911 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-06 21:56:18,912 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:56:18,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 320 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-11-06 21:56:18,914 INFO L140 encePairwiseOnDemand]: 177/181 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-06 21:56:18,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-11-06 21:56:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:56:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-11-06 21:56:18,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138121546961326 [2023-11-06 21:56:18,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-11-06 21:56:18,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-11-06 21:56:18,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:18,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-11-06 21:56:18,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,923 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 279 transitions. [2023-11-06 21:56:18,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-11-06 21:56:18,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:56:18,928 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-11-06 21:56:18,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-11-06 21:56:18,929 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-06 21:56:18,929 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-11-06 21:56:18,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:18,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:56:18,930 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)] === [2023-11-06 21:56:18,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 876124766, now seen corresponding path program 1 times [2023-11-06 21:56:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712972038] [2023-11-06 21:56:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:19,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:19,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712972038] [2023-11-06 21:56:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712972038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365983882] [2023-11-06 21:56:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:19,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:19,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:56:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:19,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:56:19,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:19,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365983882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:19,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:19,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-11-06 21:56:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096186654] [2023-11-06 21:56:19,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:56:19,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:56:19,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:56:20,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 181 [2023-11-06 21:56:20,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 13 states, 13 states have (on average 72.53846153846153) internal successors, (943), 13 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:20,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:20,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 181 [2023-11-06 21:56:20,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:20,235 INFO L124 PetriNetUnfolderBase]: 79/148 cut-off events. [2023-11-06 21:56:20,235 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 21:56:20,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 148 events. 79/148 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 419 event pairs, 6 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2023-11-06 21:56:20,237 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 26 selfloop transitions, 5 changer transitions 17/48 dead transitions. [2023-11-06 21:56:20,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 233 flow [2023-11-06 21:56:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:56:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:56:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2023-11-06 21:56:20,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425414364640884 [2023-11-06 21:56:20,240 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2023-11-06 21:56:20,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2023-11-06 21:56:20,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:20,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2023-11-06 21:56:20,243 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) [2023-11-06 21:56:20,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:20,246 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:20,247 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 7 states and 539 transitions. [2023-11-06 21:56:20,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 233 flow [2023-11-06 21:56:20,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:56:20,249 INFO L231 Difference]: Finished difference. Result has 34 places, 19 transitions, 86 flow [2023-11-06 21:56:20,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2023-11-06 21:56:20,250 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-06 21:56:20,250 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 86 flow [2023-11-06 21:56:20,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.53846153846153) internal successors, (943), 13 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:20,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:20,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:20,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:56:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:20,457 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)] === [2023-11-06 21:56:20,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1258365592, now seen corresponding path program 1 times [2023-11-06 21:56:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:20,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958515120] [2023-11-06 21:56:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:20,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:20,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:20,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958515120] [2023-11-06 21:56:20,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958515120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104461962] [2023-11-06 21:56:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:20,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:20,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:56:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:20,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:56:20,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:21,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104461962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:21,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:21,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-06 21:56:21,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610372141] [2023-11-06 21:56:21,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:56:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:56:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:56:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 181 [2023-11-06 21:56:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:21,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:21,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 181 [2023-11-06 21:56:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:21,457 INFO L124 PetriNetUnfolderBase]: 59/112 cut-off events. [2023-11-06 21:56:21,457 INFO L125 PetriNetUnfolderBase]: For 62/69 co-relation queries the response was YES. [2023-11-06 21:56:21,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 112 events. 59/112 cut-off events. For 62/69 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 317 event pairs, 6 based on Foata normal form. 8/116 useless extension candidates. Maximal degree in co-relation 337. Up to 70 conditions per place. [2023-11-06 21:56:21,459 INFO L140 encePairwiseOnDemand]: 175/181 looper letters, 19 selfloop transitions, 6 changer transitions 13/40 dead transitions. [2023-11-06 21:56:21,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 228 flow [2023-11-06 21:56:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:56:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:56:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 494 transitions. [2023-11-06 21:56:21,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548802946593002 [2023-11-06 21:56:21,463 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 494 transitions. [2023-11-06 21:56:21,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 494 transitions. [2023-11-06 21:56:21,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:21,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 494 transitions. [2023-11-06 21:56:21,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:21,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:21,468 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:21,469 INFO L175 Difference]: Start difference. First operand has 34 places, 19 transitions, 86 flow. Second operand 6 states and 494 transitions. [2023-11-06 21:56:21,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 228 flow [2023-11-06 21:56:21,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 198 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-06 21:56:21,475 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 98 flow [2023-11-06 21:56:21,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-11-06 21:56:21,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-06 21:56:21,479 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 98 flow [2023-11-06 21:56:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:21,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:21,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:21,686 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)] === [2023-11-06 21:56:21,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 96071938, now seen corresponding path program 2 times [2023-11-06 21:56:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903620487] [2023-11-06 21:56:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:22,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:22,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903620487] [2023-11-06 21:56:22,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903620487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:22,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839967765] [2023-11-06 21:56:22,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:22,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:22,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:22,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:22,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:56:22,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:22,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:56:22,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:22,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:56:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839967765] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2023-11-06 21:56:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370105162] [2023-11-06 21:56:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:22,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:56:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:56:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:56:22,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 181 [2023-11-06 21:56:22,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:22,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:22,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 181 [2023-11-06 21:56:22,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:22,432 INFO L124 PetriNetUnfolderBase]: 59/108 cut-off events. [2023-11-06 21:56:22,432 INFO L125 PetriNetUnfolderBase]: For 47/52 co-relation queries the response was YES. [2023-11-06 21:56:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 108 events. 59/108 cut-off events. For 47/52 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 249 event pairs, 7 based on Foata normal form. 6/114 useless extension candidates. Maximal degree in co-relation 326. Up to 72 conditions per place. [2023-11-06 21:56:22,434 INFO L140 encePairwiseOnDemand]: 175/181 looper letters, 20 selfloop transitions, 10 changer transitions 4/36 dead transitions. [2023-11-06 21:56:22,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 212 flow [2023-11-06 21:56:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:56:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:56:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-11-06 21:56:22,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552486187845304 [2023-11-06 21:56:22,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-11-06 21:56:22,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-11-06 21:56:22,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:22,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-11-06 21:56:22,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:22,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:22,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:22,441 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 98 flow. Second operand 5 states and 412 transitions. [2023-11-06 21:56:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 212 flow [2023-11-06 21:56:22,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 21:56:22,444 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 142 flow [2023-11-06 21:56:22,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-06 21:56:22,445 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-11-06 21:56:22,445 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 142 flow [2023-11-06 21:56:22,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:22,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:22,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:22,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:22,652 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)] === [2023-11-06 21:56:22,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -201231314, now seen corresponding path program 2 times [2023-11-06 21:56:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:22,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968587964] [2023-11-06 21:56:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968587964] [2023-11-06 21:56:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968587964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640993143] [2023-11-06 21:56:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:22,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:22,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:22,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:56:23,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:23,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:56:23,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:23,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640993143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:23,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 13 [2023-11-06 21:56:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043259497] [2023-11-06 21:56:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:56:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:56:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:56:23,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:23,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 142 flow. Second operand has 15 states, 15 states have (on average 71.26666666666667) internal successors, (1069), 15 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:23,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:23,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:23,965 INFO L124 PetriNetUnfolderBase]: 108/198 cut-off events. [2023-11-06 21:56:23,966 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-06 21:56:23,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 198 events. 108/198 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 596 event pairs, 14 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 686. Up to 120 conditions per place. [2023-11-06 21:56:23,968 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 40 selfloop transitions, 22 changer transitions 10/72 dead transitions. [2023-11-06 21:56:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 461 flow [2023-11-06 21:56:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:56:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 21:56:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 967 transitions. [2023-11-06 21:56:23,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41096472588185295 [2023-11-06 21:56:23,974 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 967 transitions. [2023-11-06 21:56:23,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 967 transitions. [2023-11-06 21:56:23,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:23,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 967 transitions. [2023-11-06 21:56:23,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.38461538461539) internal successors, (967), 13 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,985 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,985 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 142 flow. Second operand 13 states and 967 transitions. [2023-11-06 21:56:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 461 flow [2023-11-06 21:56:23,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 446 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 21:56:23,989 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 298 flow [2023-11-06 21:56:23,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=298, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-11-06 21:56:23,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2023-11-06 21:56:23,990 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 298 flow [2023-11-06 21:56:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.26666666666667) internal successors, (1069), 15 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:23,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:24,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:56:24,203 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)] === [2023-11-06 21:56:24,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1513652686, now seen corresponding path program 3 times [2023-11-06 21:56:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:24,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260709100] [2023-11-06 21:56:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260709100] [2023-11-06 21:56:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260709100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016845037] [2023-11-06 21:56:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:56:24,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:24,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:24,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:56:24,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:56:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:24,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:56:24,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:24,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016845037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:25,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-11-06 21:56:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558009337] [2023-11-06 21:56:25,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:56:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:56:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:56:25,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 181 [2023-11-06 21:56:25,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 298 flow. Second operand has 14 states, 14 states have (on average 72.35714285714286) internal successors, (1013), 14 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:25,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:25,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 181 [2023-11-06 21:56:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:25,564 INFO L124 PetriNetUnfolderBase]: 147/271 cut-off events. [2023-11-06 21:56:25,564 INFO L125 PetriNetUnfolderBase]: For 870/870 co-relation queries the response was YES. [2023-11-06 21:56:25,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 147/271 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 930 event pairs, 15 based on Foata normal form. 3/274 useless extension candidates. Maximal degree in co-relation 1191. Up to 171 conditions per place. [2023-11-06 21:56:25,568 INFO L140 encePairwiseOnDemand]: 174/181 looper letters, 49 selfloop transitions, 23 changer transitions 6/78 dead transitions. [2023-11-06 21:56:25,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 664 flow [2023-11-06 21:56:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:56:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:56:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 834 transitions. [2023-11-06 21:56:25,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418884982420894 [2023-11-06 21:56:25,574 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 834 transitions. [2023-11-06 21:56:25,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 834 transitions. [2023-11-06 21:56:25,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:25,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 834 transitions. [2023-11-06 21:56:25,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:25,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:25,618 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:25,618 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 298 flow. Second operand 11 states and 834 transitions. [2023-11-06 21:56:25,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 664 flow [2023-11-06 21:56:25,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 588 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-11-06 21:56:25,625 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 374 flow [2023-11-06 21:56:25,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=374, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-11-06 21:56:25,626 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-11-06 21:56:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 374 flow [2023-11-06 21:56:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 72.35714285714286) internal successors, (1013), 14 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:25,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:25,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:56:25,828 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)] === [2023-11-06 21:56:25,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash 756665248, now seen corresponding path program 3 times [2023-11-06 21:56:25,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:25,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723633929] [2023-11-06 21:56:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:26,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723633929] [2023-11-06 21:56:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723633929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:26,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849363916] [2023-11-06 21:56:26,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:56:26,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:26,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:26,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:26,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:56:26,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:56:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:26,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:56:26,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:26,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:56:26,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849363916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:26,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:26,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-11-06 21:56:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562399069] [2023-11-06 21:56:26,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:56:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:56:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:56:26,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 181 [2023-11-06 21:56:26,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 374 flow. Second operand has 13 states, 13 states have (on average 78.6923076923077) internal successors, (1023), 13 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:26,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 181 [2023-11-06 21:56:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:27,232 INFO L124 PetriNetUnfolderBase]: 196/389 cut-off events. [2023-11-06 21:56:27,232 INFO L125 PetriNetUnfolderBase]: For 1347/1347 co-relation queries the response was YES. [2023-11-06 21:56:27,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 389 events. 196/389 cut-off events. For 1347/1347 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1710 event pairs, 14 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1687. Up to 222 conditions per place. [2023-11-06 21:56:27,237 INFO L140 encePairwiseOnDemand]: 175/181 looper letters, 63 selfloop transitions, 26 changer transitions 32/125 dead transitions. [2023-11-06 21:56:27,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 125 transitions, 1001 flow [2023-11-06 21:56:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:56:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 21:56:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1314 transitions. [2023-11-06 21:56:27,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537292817679558 [2023-11-06 21:56:27,244 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1314 transitions. [2023-11-06 21:56:27,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1314 transitions. [2023-11-06 21:56:27,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:27,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1314 transitions. [2023-11-06 21:56:27,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:27,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:27,257 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:27,257 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 374 flow. Second operand 16 states and 1314 transitions. [2023-11-06 21:56:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 125 transitions, 1001 flow [2023-11-06 21:56:27,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 125 transitions, 878 flow, removed 51 selfloop flow, removed 6 redundant places. [2023-11-06 21:56:27,272 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 470 flow [2023-11-06 21:56:27,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=470, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-11-06 21:56:27,274 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2023-11-06 21:56:27,274 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 470 flow [2023-11-06 21:56:27,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.6923076923077) internal successors, (1023), 13 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:27,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:27,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:27,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:27,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:56:27,482 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)] === [2023-11-06 21:56:27,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash 402337234, now seen corresponding path program 1 times [2023-11-06 21:56:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:27,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38152110] [2023-11-06 21:56:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:27,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:28,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38152110] [2023-11-06 21:56:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38152110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4661453] [2023-11-06 21:56:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:28,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:28,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:28,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:28,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:56:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:28,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:56:28,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:28,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4661453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:29,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:29,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:56:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117269751] [2023-11-06 21:56:29,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:29,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:56:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:56:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:56:29,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:29,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 470 flow. Second operand has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:29,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:29,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:29,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:31,902 INFO L124 PetriNetUnfolderBase]: 269/516 cut-off events. [2023-11-06 21:56:31,902 INFO L125 PetriNetUnfolderBase]: For 2023/2023 co-relation queries the response was YES. [2023-11-06 21:56:31,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2366 conditions, 516 events. 269/516 cut-off events. For 2023/2023 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2369 event pairs, 29 based on Foata normal form. 4/518 useless extension candidates. Maximal degree in co-relation 2343. Up to 274 conditions per place. [2023-11-06 21:56:31,909 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 90 selfloop transitions, 46 changer transitions 22/158 dead transitions. [2023-11-06 21:56:31,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1298 flow [2023-11-06 21:56:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:56:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:56:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1571 transitions. [2023-11-06 21:56:31,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413312286240463 [2023-11-06 21:56:31,917 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1571 transitions. [2023-11-06 21:56:31,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1571 transitions. [2023-11-06 21:56:31,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:31,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1571 transitions. [2023-11-06 21:56:31,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 74.80952380952381) internal successors, (1571), 21 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:31,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:31,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:31,935 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 470 flow. Second operand 21 states and 1571 transitions. [2023-11-06 21:56:31,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1298 flow [2023-11-06 21:56:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 158 transitions, 1215 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-11-06 21:56:31,952 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 752 flow [2023-11-06 21:56:31,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=752, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2023-11-06 21:56:31,953 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2023-11-06 21:56:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 752 flow [2023-11-06 21:56:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:31,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:31,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:31,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:32,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:56:32,164 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)] === [2023-11-06 21:56:32,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash -974119450, now seen corresponding path program 2 times [2023-11-06 21:56:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861020115] [2023-11-06 21:56:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:32,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:32,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:32,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861020115] [2023-11-06 21:56:32,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861020115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:32,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34612084] [2023-11-06 21:56:32,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:32,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:32,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:32,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:56:33,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:33,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:56:33,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:33,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34612084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:33,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:56:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361424285] [2023-11-06 21:56:33,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:33,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:56:33,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:56:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:56:34,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:34,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 752 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:34,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:34,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:34,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:36,891 INFO L124 PetriNetUnfolderBase]: 333/661 cut-off events. [2023-11-06 21:56:36,892 INFO L125 PetriNetUnfolderBase]: For 5329/5329 co-relation queries the response was YES. [2023-11-06 21:56:36,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 661 events. 333/661 cut-off events. For 5329/5329 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3397 event pairs, 29 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 3598. Up to 308 conditions per place. [2023-11-06 21:56:36,901 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 108 selfloop transitions, 75 changer transitions 16/199 dead transitions. [2023-11-06 21:56:36,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 199 transitions, 2004 flow [2023-11-06 21:56:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:56:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 21:56:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2018 transitions. [2023-11-06 21:56:36,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41293226928586046 [2023-11-06 21:56:36,910 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2018 transitions. [2023-11-06 21:56:36,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2018 transitions. [2023-11-06 21:56:36,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:36,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2018 transitions. [2023-11-06 21:56:36,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 74.74074074074075) internal successors, (2018), 27 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:36,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:36,931 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:36,931 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 752 flow. Second operand 27 states and 2018 transitions. [2023-11-06 21:56:36,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 199 transitions, 2004 flow [2023-11-06 21:56:36,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 199 transitions, 1759 flow, removed 102 selfloop flow, removed 8 redundant places. [2023-11-06 21:56:36,959 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 1216 flow [2023-11-06 21:56:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1216, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-11-06 21:56:36,960 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2023-11-06 21:56:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 1216 flow [2023-11-06 21:56:36,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:36,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:36,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:36,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:56:37,167 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)] === [2023-11-06 21:56:37,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash -946413820, now seen corresponding path program 3 times [2023-11-06 21:56:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:37,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629310847] [2023-11-06 21:56:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:37,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:37,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629310847] [2023-11-06 21:56:37,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629310847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:37,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831984212] [2023-11-06 21:56:37,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:56:37,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:37,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:56:38,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:56:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:38,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:56:38,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:38,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831984212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:56:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412424979] [2023-11-06 21:56:38,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:56:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:56:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:56:39,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:39,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 116 transitions, 1216 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:39,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:39,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:39,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:41,792 INFO L124 PetriNetUnfolderBase]: 327/645 cut-off events. [2023-11-06 21:56:41,792 INFO L125 PetriNetUnfolderBase]: For 9337/9337 co-relation queries the response was YES. [2023-11-06 21:56:41,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 645 events. 327/645 cut-off events. For 9337/9337 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3284 event pairs, 29 based on Foata normal form. 4/649 useless extension candidates. Maximal degree in co-relation 3858. Up to 312 conditions per place. [2023-11-06 21:56:41,800 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 94 selfloop transitions, 75 changer transitions 17/186 dead transitions. [2023-11-06 21:56:41,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 186 transitions, 1963 flow [2023-11-06 21:56:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 21:56:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 21:56:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1721 transitions. [2023-11-06 21:56:41,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134037953398991 [2023-11-06 21:56:41,810 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1721 transitions. [2023-11-06 21:56:41,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1721 transitions. [2023-11-06 21:56:41,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:41,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1721 transitions. [2023-11-06 21:56:41,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 74.82608695652173) internal successors, (1721), 23 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:41,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:41,827 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:41,827 INFO L175 Difference]: Start difference. First operand has 125 places, 116 transitions, 1216 flow. Second operand 23 states and 1721 transitions. [2023-11-06 21:56:41,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 186 transitions, 1963 flow [2023-11-06 21:56:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 186 transitions, 1651 flow, removed 138 selfloop flow, removed 11 redundant places. [2023-11-06 21:56:41,871 INFO L231 Difference]: Finished difference. Result has 139 places, 120 transitions, 1240 flow [2023-11-06 21:56:41,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1240, PETRI_PLACES=139, PETRI_TRANSITIONS=120} [2023-11-06 21:56:41,873 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2023-11-06 21:56:41,874 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 120 transitions, 1240 flow [2023-11-06 21:56:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:41,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:41,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:41,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:56:42,090 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)] === [2023-11-06 21:56:42,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1450322072, now seen corresponding path program 4 times [2023-11-06 21:56:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117895648] [2023-11-06 21:56:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:42,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:42,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:42,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117895648] [2023-11-06 21:56:42,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117895648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:42,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049405968] [2023-11-06 21:56:42,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:56:42,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:42,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:42,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:56:43,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:56:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:43,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:56:43,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:43,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049405968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:45,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:45,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 21:56:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281820372] [2023-11-06 21:56:45,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:56:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:56:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:56:47,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:47,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 120 transitions, 1240 flow. Second operand has 21 states, 21 states have (on average 70.85714285714286) internal successors, (1488), 21 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:47,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:47,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:47,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:53,321 INFO L124 PetriNetUnfolderBase]: 391/760 cut-off events. [2023-11-06 21:56:53,322 INFO L125 PetriNetUnfolderBase]: For 15032/15032 co-relation queries the response was YES. [2023-11-06 21:56:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 760 events. 391/760 cut-off events. For 15032/15032 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4001 event pairs, 23 based on Foata normal form. 5/765 useless extension candidates. Maximal degree in co-relation 4920. Up to 374 conditions per place. [2023-11-06 21:56:53,333 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 132 selfloop transitions, 74 changer transitions 32/238 dead transitions. [2023-11-06 21:56:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 238 transitions, 2652 flow [2023-11-06 21:56:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 21:56:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 21:56:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2380 transitions. [2023-11-06 21:56:53,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41091160220994477 [2023-11-06 21:56:53,339 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2380 transitions. [2023-11-06 21:56:53,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2380 transitions. [2023-11-06 21:56:53,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:53,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2380 transitions. [2023-11-06 21:56:53,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 74.375) internal successors, (2380), 32 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:53,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 181.0) internal successors, (5973), 33 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:53,354 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 181.0) internal successors, (5973), 33 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:53,355 INFO L175 Difference]: Start difference. First operand has 139 places, 120 transitions, 1240 flow. Second operand 32 states and 2380 transitions. [2023-11-06 21:56:53,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 238 transitions, 2652 flow [2023-11-06 21:56:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 238 transitions, 2318 flow, removed 109 selfloop flow, removed 17 redundant places. [2023-11-06 21:56:53,414 INFO L231 Difference]: Finished difference. Result has 160 places, 142 transitions, 1497 flow [2023-11-06 21:56:53,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1497, PETRI_PLACES=160, PETRI_TRANSITIONS=142} [2023-11-06 21:56:53,415 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-11-06 21:56:53,415 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 142 transitions, 1497 flow [2023-11-06 21:56:53,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.85714285714286) internal successors, (1488), 21 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:53,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:53,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:53,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 21:56:53,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:56:53,616 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)] === [2023-11-06 21:56:53,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash -597555764, now seen corresponding path program 5 times [2023-11-06 21:56:53,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:53,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179906431] [2023-11-06 21:56:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179906431] [2023-11-06 21:56:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179906431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109643496] [2023-11-06 21:56:54,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:56:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:54,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:54,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:56:54,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:54,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:54,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:56:54,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:54,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:55,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109643496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:55,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:55,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:56:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198616581] [2023-11-06 21:56:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:55,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:56:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:56:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:56:56,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:56:56,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 142 transitions, 1497 flow. Second operand has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:56,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:56,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:56:56,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:57,345 INFO L124 PetriNetUnfolderBase]: 423/816 cut-off events. [2023-11-06 21:56:57,345 INFO L125 PetriNetUnfolderBase]: For 18894/18894 co-relation queries the response was YES. [2023-11-06 21:56:57,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5483 conditions, 816 events. 423/816 cut-off events. For 18894/18894 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4317 event pairs, 61 based on Foata normal form. 3/817 useless extension candidates. Maximal degree in co-relation 5428. Up to 682 conditions per place. [2023-11-06 21:56:57,356 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 155 selfloop transitions, 37 changer transitions 18/210 dead transitions. [2023-11-06 21:56:57,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 2607 flow [2023-11-06 21:56:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:56:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 21:56:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1195 transitions. [2023-11-06 21:56:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263812154696133 [2023-11-06 21:56:57,360 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1195 transitions. [2023-11-06 21:56:57,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1195 transitions. [2023-11-06 21:56:57,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:57,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1195 transitions. [2023-11-06 21:56:57,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 74.6875) internal successors, (1195), 16 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,368 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,368 INFO L175 Difference]: Start difference. First operand has 160 places, 142 transitions, 1497 flow. Second operand 16 states and 1195 transitions. [2023-11-06 21:56:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 2607 flow [2023-11-06 21:56:57,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2261 flow, removed 131 selfloop flow, removed 14 redundant places. [2023-11-06 21:56:57,448 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1732 flow [2023-11-06 21:56:57,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1732, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2023-11-06 21:56:57,449 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2023-11-06 21:56:57,449 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1732 flow [2023-11-06 21:56:57,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:57,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:57,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:57,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:56:57,660 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)] === [2023-11-06 21:56:57,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1045603884, now seen corresponding path program 6 times [2023-11-06 21:56:57,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:57,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861524300] [2023-11-06 21:56:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:57,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861524300] [2023-11-06 21:56:58,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861524300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005327639] [2023-11-06 21:56:58,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:56:58,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:58,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:58,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:56:58,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:56:58,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:58,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:56:58,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:58,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:59,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005327639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:59,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:59,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:56:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706648095] [2023-11-06 21:56:59,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:59,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:56:59,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:56:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:00,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:00,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1732 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:00,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:00,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:00,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:02,272 INFO L124 PetriNetUnfolderBase]: 470/913 cut-off events. [2023-11-06 21:57:02,272 INFO L125 PetriNetUnfolderBase]: For 17314/17314 co-relation queries the response was YES. [2023-11-06 21:57:02,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 913 events. 470/913 cut-off events. For 17314/17314 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5008 event pairs, 64 based on Foata normal form. 2/905 useless extension candidates. Maximal degree in co-relation 5790. Up to 744 conditions per place. [2023-11-06 21:57:02,286 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 178 selfloop transitions, 55 changer transitions 11/244 dead transitions. [2023-11-06 21:57:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 244 transitions, 2887 flow [2023-11-06 21:57:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 21:57:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 21:57:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1698 transitions. [2023-11-06 21:57:02,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40787893346144605 [2023-11-06 21:57:02,294 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1698 transitions. [2023-11-06 21:57:02,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1698 transitions. [2023-11-06 21:57:02,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:02,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1698 transitions. [2023-11-06 21:57:02,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 73.82608695652173) internal successors, (1698), 23 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:02,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:02,313 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:02,313 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1732 flow. Second operand 23 states and 1698 transitions. [2023-11-06 21:57:02,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 244 transitions, 2887 flow [2023-11-06 21:57:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 244 transitions, 2662 flow, removed 107 selfloop flow, removed 3 redundant places. [2023-11-06 21:57:02,400 INFO L231 Difference]: Finished difference. Result has 193 places, 191 transitions, 2120 flow [2023-11-06 21:57:02,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2120, PETRI_PLACES=193, PETRI_TRANSITIONS=191} [2023-11-06 21:57:02,401 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2023-11-06 21:57:02,401 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 191 transitions, 2120 flow [2023-11-06 21:57:02,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:02,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:02,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:02,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:02,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:57:02,608 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)] === [2023-11-06 21:57:02,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1967640332, now seen corresponding path program 7 times [2023-11-06 21:57:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:02,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84398127] [2023-11-06 21:57:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84398127] [2023-11-06 21:57:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84398127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187037912] [2023-11-06 21:57:03,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:57:03,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:03,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:03,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:57:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:03,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:03,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:03,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187037912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:04,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:04,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932486658] [2023-11-06 21:57:04,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:04,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:04,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:04,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:04,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 191 transitions, 2120 flow. Second operand has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:04,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:04,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:04,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:06,282 INFO L124 PetriNetUnfolderBase]: 503/978 cut-off events. [2023-11-06 21:57:06,282 INFO L125 PetriNetUnfolderBase]: For 18521/18521 co-relation queries the response was YES. [2023-11-06 21:57:06,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6547 conditions, 978 events. 503/978 cut-off events. For 18521/18521 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5484 event pairs, 65 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 6479. Up to 777 conditions per place. [2023-11-06 21:57:06,294 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 178 selfloop transitions, 63 changer transitions 10/251 dead transitions. [2023-11-06 21:57:06,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 251 transitions, 3181 flow [2023-11-06 21:57:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:57:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 21:57:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1483 transitions. [2023-11-06 21:57:06,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40966850828729284 [2023-11-06 21:57:06,298 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1483 transitions. [2023-11-06 21:57:06,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1483 transitions. [2023-11-06 21:57:06,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:06,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1483 transitions. [2023-11-06 21:57:06,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 74.15) internal successors, (1483), 20 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:06,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 181.0) internal successors, (3801), 21 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 181.0) internal successors, (3801), 21 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:06,308 INFO L175 Difference]: Start difference. First operand has 193 places, 191 transitions, 2120 flow. Second operand 20 states and 1483 transitions. [2023-11-06 21:57:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 251 transitions, 3181 flow [2023-11-06 21:57:06,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 251 transitions, 2892 flow, removed 122 selfloop flow, removed 11 redundant places. [2023-11-06 21:57:06,402 INFO L231 Difference]: Finished difference. Result has 207 places, 203 transitions, 2308 flow [2023-11-06 21:57:06,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2308, PETRI_PLACES=207, PETRI_TRANSITIONS=203} [2023-11-06 21:57:06,403 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-11-06 21:57:06,403 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 203 transitions, 2308 flow [2023-11-06 21:57:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:06,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:06,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:06,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:06,610 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)] === [2023-11-06 21:57:06,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1882476512, now seen corresponding path program 8 times [2023-11-06 21:57:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468926640] [2023-11-06 21:57:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468926640] [2023-11-06 21:57:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468926640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762038091] [2023-11-06 21:57:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:07,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:07,233 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:07,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:57:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:07,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:07,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:07,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762038091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:08,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954187343] [2023-11-06 21:57:08,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:08,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:09,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 203 transitions, 2308 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:09,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:09,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:09,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:11,086 INFO L124 PetriNetUnfolderBase]: 493/956 cut-off events. [2023-11-06 21:57:11,087 INFO L125 PetriNetUnfolderBase]: For 17592/17592 co-relation queries the response was YES. [2023-11-06 21:57:11,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6365 conditions, 956 events. 493/956 cut-off events. For 17592/17592 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5309 event pairs, 65 based on Foata normal form. 2/944 useless extension candidates. Maximal degree in co-relation 6291. Up to 777 conditions per place. [2023-11-06 21:57:11,098 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 169 selfloop transitions, 61 changer transitions 10/240 dead transitions. [2023-11-06 21:57:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 240 transitions, 2969 flow [2023-11-06 21:57:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:57:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:57:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1329 transitions. [2023-11-06 21:57:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40791896869244937 [2023-11-06 21:57:11,102 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1329 transitions. [2023-11-06 21:57:11,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1329 transitions. [2023-11-06 21:57:11,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:11,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1329 transitions. [2023-11-06 21:57:11,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 73.83333333333333) internal successors, (1329), 18 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:11,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:11,111 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:11,111 INFO L175 Difference]: Start difference. First operand has 207 places, 203 transitions, 2308 flow. Second operand 18 states and 1329 transitions. [2023-11-06 21:57:11,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 240 transitions, 2969 flow [2023-11-06 21:57:11,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 240 transitions, 2670 flow, removed 120 selfloop flow, removed 12 redundant places. [2023-11-06 21:57:11,206 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 2245 flow [2023-11-06 21:57:11,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2245, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2023-11-06 21:57:11,207 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2023-11-06 21:57:11,208 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 2245 flow [2023-11-06 21:57:11,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:11,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:11,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:11,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:11,416 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)] === [2023-11-06 21:57:11,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -186134708, now seen corresponding path program 9 times [2023-11-06 21:57:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:11,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915919027] [2023-11-06 21:57:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:11,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:11,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915919027] [2023-11-06 21:57:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915919027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573801990] [2023-11-06 21:57:11,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:57:11,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:11,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:11,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:57:12,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:57:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:12,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:12,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:12,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:13,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573801990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:13,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:13,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992719604] [2023-11-06 21:57:13,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:13,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:14,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:14,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 2245 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:14,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:14,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:15,280 INFO L124 PetriNetUnfolderBase]: 500/978 cut-off events. [2023-11-06 21:57:15,280 INFO L125 PetriNetUnfolderBase]: For 18271/18271 co-relation queries the response was YES. [2023-11-06 21:57:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6474 conditions, 978 events. 500/978 cut-off events. For 18271/18271 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5486 event pairs, 74 based on Foata normal form. 3/965 useless extension candidates. Maximal degree in co-relation 6399. Up to 868 conditions per place. [2023-11-06 21:57:15,302 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 191 selfloop transitions, 43 changer transitions 8/242 dead transitions. [2023-11-06 21:57:15,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 242 transitions, 2940 flow [2023-11-06 21:57:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:57:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:57:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1324 transitions. [2023-11-06 21:57:15,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40638428483732353 [2023-11-06 21:57:15,317 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1324 transitions. [2023-11-06 21:57:15,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1324 transitions. [2023-11-06 21:57:15,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:15,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1324 transitions. [2023-11-06 21:57:15,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 73.55555555555556) internal successors, (1324), 18 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:15,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:15,328 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:15,328 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 2245 flow. Second operand 18 states and 1324 transitions. [2023-11-06 21:57:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 242 transitions, 2940 flow [2023-11-06 21:57:15,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 242 transitions, 2767 flow, removed 40 selfloop flow, removed 14 redundant places. [2023-11-06 21:57:15,436 INFO L231 Difference]: Finished difference. Result has 219 places, 209 transitions, 2282 flow [2023-11-06 21:57:15,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2282, PETRI_PLACES=219, PETRI_TRANSITIONS=209} [2023-11-06 21:57:15,437 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2023-11-06 21:57:15,437 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 209 transitions, 2282 flow [2023-11-06 21:57:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:15,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:15,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:15,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:15,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:15,643 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)] === [2023-11-06 21:57:15,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -11234710, now seen corresponding path program 10 times [2023-11-06 21:57:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:15,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875416446] [2023-11-06 21:57:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:16,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875416446] [2023-11-06 21:57:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875416446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442539840] [2023-11-06 21:57:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:57:16,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:16,133 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:16,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:57:16,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:57:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:16,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:16,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:16,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442539840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:17,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:17,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109270803] [2023-11-06 21:57:17,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:18,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:18,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 209 transitions, 2282 flow. Second operand has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:18,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:18,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:18,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:19,263 INFO L124 PetriNetUnfolderBase]: 525/1008 cut-off events. [2023-11-06 21:57:19,263 INFO L125 PetriNetUnfolderBase]: For 19033/19033 co-relation queries the response was YES. [2023-11-06 21:57:19,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6816 conditions, 1008 events. 525/1008 cut-off events. For 19033/19033 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5572 event pairs, 68 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 6737. Up to 862 conditions per place. [2023-11-06 21:57:19,275 INFO L140 encePairwiseOnDemand]: 172/181 looper letters, 209 selfloop transitions, 46 changer transitions 18/273 dead transitions. [2023-11-06 21:57:19,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 273 transitions, 3474 flow [2023-11-06 21:57:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:57:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:57:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1343 transitions. [2023-11-06 21:57:19,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122160834868017 [2023-11-06 21:57:19,278 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1343 transitions. [2023-11-06 21:57:19,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1343 transitions. [2023-11-06 21:57:19,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:19,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1343 transitions. [2023-11-06 21:57:19,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 74.61111111111111) internal successors, (1343), 18 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:19,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:19,285 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:19,285 INFO L175 Difference]: Start difference. First operand has 219 places, 209 transitions, 2282 flow. Second operand 18 states and 1343 transitions. [2023-11-06 21:57:19,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 273 transitions, 3474 flow [2023-11-06 21:57:19,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 273 transitions, 3374 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-11-06 21:57:19,408 INFO L231 Difference]: Finished difference. Result has 228 places, 225 transitions, 2675 flow [2023-11-06 21:57:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2675, PETRI_PLACES=228, PETRI_TRANSITIONS=225} [2023-11-06 21:57:19,409 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 199 predicate places. [2023-11-06 21:57:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 225 transitions, 2675 flow [2023-11-06 21:57:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:19,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:19,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:19,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:19,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:19,625 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)] === [2023-11-06 21:57:19,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1065449916, now seen corresponding path program 11 times [2023-11-06 21:57:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:19,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284090995] [2023-11-06 21:57:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284090995] [2023-11-06 21:57:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284090995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751242018] [2023-11-06 21:57:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:57:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:20,243 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:20,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:57:20,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:20,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:20,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:20,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:20,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751242018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:21,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:21,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:57:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47553702] [2023-11-06 21:57:21,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:21,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:57:21,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:57:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:22,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:22,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 225 transitions, 2675 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:22,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:22,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:22,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:24,036 INFO L124 PetriNetUnfolderBase]: 576/1123 cut-off events. [2023-11-06 21:57:24,036 INFO L125 PetriNetUnfolderBase]: For 24116/24116 co-relation queries the response was YES. [2023-11-06 21:57:24,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7813 conditions, 1123 events. 576/1123 cut-off events. For 24116/24116 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6532 event pairs, 62 based on Foata normal form. 3/1110 useless extension candidates. Maximal degree in co-relation 7729. Up to 845 conditions per place. [2023-11-06 21:57:24,056 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 209 selfloop transitions, 81 changer transitions 23/313 dead transitions. [2023-11-06 21:57:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 313 transitions, 4400 flow [2023-11-06 21:57:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:57:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:57:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1635 transitions. [2023-11-06 21:57:24,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41059768960321447 [2023-11-06 21:57:24,061 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1635 transitions. [2023-11-06 21:57:24,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1635 transitions. [2023-11-06 21:57:24,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:24,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1635 transitions. [2023-11-06 21:57:24,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 74.31818181818181) internal successors, (1635), 22 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,073 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,073 INFO L175 Difference]: Start difference. First operand has 228 places, 225 transitions, 2675 flow. Second operand 22 states and 1635 transitions. [2023-11-06 21:57:24,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 313 transitions, 4400 flow [2023-11-06 21:57:24,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4113 flow, removed 123 selfloop flow, removed 10 redundant places. [2023-11-06 21:57:24,269 INFO L231 Difference]: Finished difference. Result has 244 places, 256 transitions, 3301 flow [2023-11-06 21:57:24,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3301, PETRI_PLACES=244, PETRI_TRANSITIONS=256} [2023-11-06 21:57:24,271 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2023-11-06 21:57:24,271 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 256 transitions, 3301 flow [2023-11-06 21:57:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:24,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:24,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:24,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:24,480 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)] === [2023-11-06 21:57:24,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 121970120, now seen corresponding path program 12 times [2023-11-06 21:57:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:24,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911430720] [2023-11-06 21:57:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:25,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:25,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911430720] [2023-11-06 21:57:25,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911430720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:25,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305911023] [2023-11-06 21:57:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:57:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:25,314 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:25,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:57:25,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:57:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:25,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:25,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:25,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:26,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305911023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:26,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:26,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:57:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437017998] [2023-11-06 21:57:26,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:57:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:57:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:28,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:28,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 256 transitions, 3301 flow. Second operand has 19 states, 19 states have (on average 70.89473684210526) internal successors, (1347), 19 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:28,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:28,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:28,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:30,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 21:57:32,141 INFO L124 PetriNetUnfolderBase]: 602/1154 cut-off events. [2023-11-06 21:57:32,141 INFO L125 PetriNetUnfolderBase]: For 26103/26103 co-relation queries the response was YES. [2023-11-06 21:57:32,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8480 conditions, 1154 events. 602/1154 cut-off events. For 26103/26103 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6640 event pairs, 58 based on Foata normal form. 3/1139 useless extension candidates. Maximal degree in co-relation 8394. Up to 842 conditions per place. [2023-11-06 21:57:32,153 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 211 selfloop transitions, 101 changer transitions 17/329 dead transitions. [2023-11-06 21:57:32,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 329 transitions, 4806 flow [2023-11-06 21:57:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:57:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 21:57:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1855 transitions. [2023-11-06 21:57:32,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40994475138121544 [2023-11-06 21:57:32,188 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1855 transitions. [2023-11-06 21:57:32,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1855 transitions. [2023-11-06 21:57:32,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:32,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1855 transitions. [2023-11-06 21:57:32,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 74.2) internal successors, (1855), 25 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:32,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 181.0) internal successors, (4706), 26 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:32,196 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 181.0) internal successors, (4706), 26 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:32,196 INFO L175 Difference]: Start difference. First operand has 244 places, 256 transitions, 3301 flow. Second operand 25 states and 1855 transitions. [2023-11-06 21:57:32,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 329 transitions, 4806 flow [2023-11-06 21:57:32,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 329 transitions, 4162 flow, removed 306 selfloop flow, removed 11 redundant places. [2023-11-06 21:57:32,397 INFO L231 Difference]: Finished difference. Result has 259 places, 270 transitions, 3299 flow [2023-11-06 21:57:32,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3299, PETRI_PLACES=259, PETRI_TRANSITIONS=270} [2023-11-06 21:57:32,401 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 230 predicate places. [2023-11-06 21:57:32,401 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 270 transitions, 3299 flow [2023-11-06 21:57:32,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.89473684210526) internal successors, (1347), 19 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:32,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:32,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:32,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:32,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:32,613 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)] === [2023-11-06 21:57:32,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash -121669206, now seen corresponding path program 13 times [2023-11-06 21:57:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:32,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680788505] [2023-11-06 21:57:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:32,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680788505] [2023-11-06 21:57:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680788505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148262958] [2023-11-06 21:57:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:57:33,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:33,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:33,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:33,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:57:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:33,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:33,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:33,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:34,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148262958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:34,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:34,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:57:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894598401] [2023-11-06 21:57:34,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:57:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:57:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:35,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:35,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 270 transitions, 3299 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:35,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:35,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:35,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:37,253 INFO L124 PetriNetUnfolderBase]: 598/1151 cut-off events. [2023-11-06 21:57:37,254 INFO L125 PetriNetUnfolderBase]: For 20219/20219 co-relation queries the response was YES. [2023-11-06 21:57:37,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7940 conditions, 1151 events. 598/1151 cut-off events. For 20219/20219 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6635 event pairs, 56 based on Foata normal form. 3/1126 useless extension candidates. Maximal degree in co-relation 7856. Up to 931 conditions per place. [2023-11-06 21:57:37,268 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 233 selfloop transitions, 76 changer transitions 19/328 dead transitions. [2023-11-06 21:57:37,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 328 transitions, 4304 flow [2023-11-06 21:57:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 21:57:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 21:57:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1698 transitions. [2023-11-06 21:57:37,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40787893346144605 [2023-11-06 21:57:37,272 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1698 transitions. [2023-11-06 21:57:37,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1698 transitions. [2023-11-06 21:57:37,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:37,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1698 transitions. [2023-11-06 21:57:37,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 73.82608695652173) internal successors, (1698), 23 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,279 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,279 INFO L175 Difference]: Start difference. First operand has 259 places, 270 transitions, 3299 flow. Second operand 23 states and 1698 transitions. [2023-11-06 21:57:37,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 328 transitions, 4304 flow [2023-11-06 21:57:37,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 328 transitions, 3864 flow, removed 183 selfloop flow, removed 13 redundant places. [2023-11-06 21:57:37,452 INFO L231 Difference]: Finished difference. Result has 273 places, 275 transitions, 3216 flow [2023-11-06 21:57:37,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3216, PETRI_PLACES=273, PETRI_TRANSITIONS=275} [2023-11-06 21:57:37,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 244 predicate places. [2023-11-06 21:57:37,453 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 275 transitions, 3216 flow [2023-11-06 21:57:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:37,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:37,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:37,654 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)] === [2023-11-06 21:57:37,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 205980740, now seen corresponding path program 14 times [2023-11-06 21:57:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087621146] [2023-11-06 21:57:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087621146] [2023-11-06 21:57:38,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087621146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:38,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177500754] [2023-11-06 21:57:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:38,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:38,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:38,390 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:57:38,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:38,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:38,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:38,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:39,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177500754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:39,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:39,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 21:57:39,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008223023] [2023-11-06 21:57:39,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:57:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:57:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:40,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:40,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 275 transitions, 3216 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:40,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:40,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:40,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:42,902 INFO L124 PetriNetUnfolderBase]: 594/1146 cut-off events. [2023-11-06 21:57:42,902 INFO L125 PetriNetUnfolderBase]: For 16486/16486 co-relation queries the response was YES. [2023-11-06 21:57:42,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7550 conditions, 1146 events. 594/1146 cut-off events. For 16486/16486 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6599 event pairs, 54 based on Foata normal form. 3/1125 useless extension candidates. Maximal degree in co-relation 7460. Up to 853 conditions per place. [2023-11-06 21:57:42,916 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 215 selfloop transitions, 108 changer transitions 14/337 dead transitions. [2023-11-06 21:57:42,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 337 transitions, 4250 flow [2023-11-06 21:57:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:57:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:57:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1928 transitions. [2023-11-06 21:57:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096897577560561 [2023-11-06 21:57:42,921 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1928 transitions. [2023-11-06 21:57:42,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1928 transitions. [2023-11-06 21:57:42,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:42,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1928 transitions. [2023-11-06 21:57:42,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.15384615384616) internal successors, (1928), 26 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:42,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:42,932 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:42,932 INFO L175 Difference]: Start difference. First operand has 273 places, 275 transitions, 3216 flow. Second operand 26 states and 1928 transitions. [2023-11-06 21:57:42,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 337 transitions, 4250 flow [2023-11-06 21:57:43,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 337 transitions, 4135 flow, removed 23 selfloop flow, removed 15 redundant places. [2023-11-06 21:57:43,129 INFO L231 Difference]: Finished difference. Result has 283 places, 280 transitions, 3526 flow [2023-11-06 21:57:43,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3526, PETRI_PLACES=283, PETRI_TRANSITIONS=280} [2023-11-06 21:57:43,130 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 254 predicate places. [2023-11-06 21:57:43,131 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 280 transitions, 3526 flow [2023-11-06 21:57:43,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:43,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:43,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:43,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:43,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:57:43,339 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)] === [2023-11-06 21:57:43,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash -505122530, now seen corresponding path program 15 times [2023-11-06 21:57:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:43,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111704868] [2023-11-06 21:57:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111704868] [2023-11-06 21:57:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111704868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631824695] [2023-11-06 21:57:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:57:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:44,023 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:44,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:57:44,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:57:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:44,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:44,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:44,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:45,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631824695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:45,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:45,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144334188] [2023-11-06 21:57:45,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:46,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:46,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 280 transitions, 3526 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:46,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:46,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:48,464 INFO L124 PetriNetUnfolderBase]: 616/1183 cut-off events. [2023-11-06 21:57:48,464 INFO L125 PetriNetUnfolderBase]: For 22109/22109 co-relation queries the response was YES. [2023-11-06 21:57:48,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8457 conditions, 1183 events. 616/1183 cut-off events. For 22109/22109 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6841 event pairs, 64 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 8366. Up to 1015 conditions per place. [2023-11-06 21:57:48,480 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 261 selfloop transitions, 62 changer transitions 8/331 dead transitions. [2023-11-06 21:57:48,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 331 transitions, 4824 flow [2023-11-06 21:57:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:57:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:57:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1335 transitions. [2023-11-06 21:57:48,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097605893186004 [2023-11-06 21:57:48,484 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1335 transitions. [2023-11-06 21:57:48,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1335 transitions. [2023-11-06 21:57:48,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:48,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1335 transitions. [2023-11-06 21:57:48,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 74.16666666666667) internal successors, (1335), 18 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,492 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,492 INFO L175 Difference]: Start difference. First operand has 283 places, 280 transitions, 3526 flow. Second operand 18 states and 1335 transitions. [2023-11-06 21:57:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 331 transitions, 4824 flow [2023-11-06 21:57:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 331 transitions, 4450 flow, removed 139 selfloop flow, removed 18 redundant places. [2023-11-06 21:57:48,752 INFO L231 Difference]: Finished difference. Result has 285 places, 291 transitions, 3720 flow [2023-11-06 21:57:48,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3720, PETRI_PLACES=285, PETRI_TRANSITIONS=291} [2023-11-06 21:57:48,753 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 256 predicate places. [2023-11-06 21:57:48,754 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 291 transitions, 3720 flow [2023-11-06 21:57:48,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:48,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:48,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 21:57:48,961 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)] === [2023-11-06 21:57:48,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash 354346646, now seen corresponding path program 16 times [2023-11-06 21:57:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801114729] [2023-11-06 21:57:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:49,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:49,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801114729] [2023-11-06 21:57:49,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801114729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:49,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532942166] [2023-11-06 21:57:49,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:57:49,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:49,576 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:49,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:57:49,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:57:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:49,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:49,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:49,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:51,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532942166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:51,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:51,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289952928] [2023-11-06 21:57:51,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:51,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:51,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 291 transitions, 3720 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:51,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:53,078 INFO L124 PetriNetUnfolderBase]: 618/1196 cut-off events. [2023-11-06 21:57:53,078 INFO L125 PetriNetUnfolderBase]: For 19084/19084 co-relation queries the response was YES. [2023-11-06 21:57:53,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8468 conditions, 1196 events. 618/1196 cut-off events. For 19084/19084 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6964 event pairs, 72 based on Foata normal form. 3/1169 useless extension candidates. Maximal degree in co-relation 8374. Up to 1091 conditions per place. [2023-11-06 21:57:53,091 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 270 selfloop transitions, 45 changer transitions 7/322 dead transitions. [2023-11-06 21:57:53,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 322 transitions, 4611 flow [2023-11-06 21:57:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:57:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 21:57:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1177 transitions. [2023-11-06 21:57:53,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40642265193370164 [2023-11-06 21:57:53,093 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1177 transitions. [2023-11-06 21:57:53,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1177 transitions. [2023-11-06 21:57:53,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:53,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1177 transitions. [2023-11-06 21:57:53,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.5625) internal successors, (1177), 16 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:53,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:53,098 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 181.0) internal successors, (3077), 17 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:53,099 INFO L175 Difference]: Start difference. First operand has 285 places, 291 transitions, 3720 flow. Second operand 16 states and 1177 transitions. [2023-11-06 21:57:53,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 322 transitions, 4611 flow [2023-11-06 21:57:53,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 322 transitions, 4201 flow, removed 171 selfloop flow, removed 13 redundant places. [2023-11-06 21:57:53,228 INFO L231 Difference]: Finished difference. Result has 290 places, 294 transitions, 3527 flow [2023-11-06 21:57:53,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3527, PETRI_PLACES=290, PETRI_TRANSITIONS=294} [2023-11-06 21:57:53,229 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 261 predicate places. [2023-11-06 21:57:53,229 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 294 transitions, 3527 flow [2023-11-06 21:57:53,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:53,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:53,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:53,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 21:57:53,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 21:57:53,435 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)] === [2023-11-06 21:57:53,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1341995158, now seen corresponding path program 17 times [2023-11-06 21:57:53,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:53,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592636146] [2023-11-06 21:57:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592636146] [2023-11-06 21:57:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592636146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789409594] [2023-11-06 21:57:54,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:57:54,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:54,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:54,011 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:54,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:57:54,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:57:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:54,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:54,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789409594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:55,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:55,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:57:55,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986571398] [2023-11-06 21:57:55,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:57:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:57:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:55,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:57:55,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 294 transitions, 3527 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:55,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:55,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:57:55,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:57,916 INFO L124 PetriNetUnfolderBase]: 649/1248 cut-off events. [2023-11-06 21:57:57,916 INFO L125 PetriNetUnfolderBase]: For 22218/22218 co-relation queries the response was YES. [2023-11-06 21:57:57,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1248 events. 649/1248 cut-off events. For 22218/22218 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7297 event pairs, 64 based on Foata normal form. 2/1216 useless extension candidates. Maximal degree in co-relation 8846. Up to 1076 conditions per place. [2023-11-06 21:57:57,932 INFO L140 encePairwiseOnDemand]: 172/181 looper letters, 275 selfloop transitions, 60 changer transitions 10/345 dead transitions. [2023-11-06 21:57:57,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 345 transitions, 4831 flow [2023-11-06 21:57:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:57:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:57:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1617 transitions. [2023-11-06 21:57:57,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40607734806629836 [2023-11-06 21:57:57,937 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1617 transitions. [2023-11-06 21:57:57,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1617 transitions. [2023-11-06 21:57:57,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:57,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1617 transitions. [2023-11-06 21:57:57,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.5) internal successors, (1617), 22 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:57,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:57,947 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:57,947 INFO L175 Difference]: Start difference. First operand has 290 places, 294 transitions, 3527 flow. Second operand 22 states and 1617 transitions. [2023-11-06 21:57:57,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 345 transitions, 4831 flow [2023-11-06 21:57:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 345 transitions, 4680 flow, removed 37 selfloop flow, removed 13 redundant places. [2023-11-06 21:57:58,139 INFO L231 Difference]: Finished difference. Result has 302 places, 304 transitions, 3888 flow [2023-11-06 21:57:58,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3888, PETRI_PLACES=302, PETRI_TRANSITIONS=304} [2023-11-06 21:57:58,140 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 273 predicate places. [2023-11-06 21:57:58,140 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 304 transitions, 3888 flow [2023-11-06 21:57:58,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:58,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:58,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:58,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:58,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 21:57:58,345 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)] === [2023-11-06 21:57:58,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1427158978, now seen corresponding path program 18 times [2023-11-06 21:57:58,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707248549] [2023-11-06 21:57:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707248549] [2023-11-06 21:57:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707248549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028291305] [2023-11-06 21:57:59,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:57:59,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:59,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:59,038 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:59,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 21:57:59,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:57:59,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:59,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:57:59,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:59,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:00,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028291305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:00,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 21:58:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004217282] [2023-11-06 21:58:00,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:00,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:58:00,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:58:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:58:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:58:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 304 transitions, 3888 flow. Second operand has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:00,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:58:00,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:03,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 21:58:04,698 INFO L124 PetriNetUnfolderBase]: 680/1303 cut-off events. [2023-11-06 21:58:04,698 INFO L125 PetriNetUnfolderBase]: For 30721/30721 co-relation queries the response was YES. [2023-11-06 21:58:04,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10058 conditions, 1303 events. 680/1303 cut-off events. For 30721/30721 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7638 event pairs, 68 based on Foata normal form. 2/1273 useless extension candidates. Maximal degree in co-relation 9962. Up to 1116 conditions per place. [2023-11-06 21:58:04,713 INFO L140 encePairwiseOnDemand]: 172/181 looper letters, 289 selfloop transitions, 64 changer transitions 11/364 dead transitions. [2023-11-06 21:58:04,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 364 transitions, 5413 flow [2023-11-06 21:58:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:58:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:58:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1769 transitions. [2023-11-06 21:58:04,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072283609576427 [2023-11-06 21:58:04,722 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1769 transitions. [2023-11-06 21:58:04,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1769 transitions. [2023-11-06 21:58:04,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:04,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1769 transitions. [2023-11-06 21:58:04,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.70833333333333) internal successors, (1769), 24 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:04,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:04,730 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:04,730 INFO L175 Difference]: Start difference. First operand has 302 places, 304 transitions, 3888 flow. Second operand 24 states and 1769 transitions. [2023-11-06 21:58:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 364 transitions, 5413 flow [2023-11-06 21:58:04,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 364 transitions, 4848 flow, removed 252 selfloop flow, removed 16 redundant places. [2023-11-06 21:58:04,907 INFO L231 Difference]: Finished difference. Result has 313 places, 314 transitions, 4102 flow [2023-11-06 21:58:04,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4102, PETRI_PLACES=313, PETRI_TRANSITIONS=314} [2023-11-06 21:58:04,908 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-11-06 21:58:04,908 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 314 transitions, 4102 flow [2023-11-06 21:58:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:04,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:04,908 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:04,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:05,114 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)] === [2023-11-06 21:58:05,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1884726778, now seen corresponding path program 4 times [2023-11-06 21:58:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:05,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841966234] [2023-11-06 21:58:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:05,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841966234] [2023-11-06 21:58:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841966234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:05,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090864473] [2023-11-06 21:58:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:58:05,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:05,376 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 21:58:05,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:58:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:05,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:58:05,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:05,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090864473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:06,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 13 [2023-11-06 21:58:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715515400] [2023-11-06 21:58:06,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:58:06,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 181 [2023-11-06 21:58:06,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 314 transitions, 4102 flow. Second operand has 15 states, 15 states have (on average 78.46666666666667) internal successors, (1177), 15 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:06,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:06,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 181 [2023-11-06 21:58:06,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:08,413 INFO L124 PetriNetUnfolderBase]: 673/1302 cut-off events. [2023-11-06 21:58:08,413 INFO L125 PetriNetUnfolderBase]: For 23761/23781 co-relation queries the response was YES. [2023-11-06 21:58:08,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9640 conditions, 1302 events. 673/1302 cut-off events. For 23761/23781 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7787 event pairs, 50 based on Foata normal form. 2/1268 useless extension candidates. Maximal degree in co-relation 9539. Up to 1032 conditions per place. [2023-11-06 21:58:08,436 INFO L140 encePairwiseOnDemand]: 175/181 looper letters, 277 selfloop transitions, 70 changer transitions 8/362 dead transitions. [2023-11-06 21:58:08,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 362 transitions, 5253 flow [2023-11-06 21:58:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:58:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:58:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1224 transitions. [2023-11-06 21:58:08,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450828729281768 [2023-11-06 21:58:08,440 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1224 transitions. [2023-11-06 21:58:08,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1224 transitions. [2023-11-06 21:58:08,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:08,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1224 transitions. [2023-11-06 21:58:08,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 81.6) internal successors, (1224), 15 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:08,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:08,446 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:08,446 INFO L175 Difference]: Start difference. First operand has 313 places, 314 transitions, 4102 flow. Second operand 15 states and 1224 transitions. [2023-11-06 21:58:08,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 362 transitions, 5253 flow [2023-11-06 21:58:08,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 362 transitions, 4951 flow, removed 113 selfloop flow, removed 20 redundant places. [2023-11-06 21:58:08,618 INFO L231 Difference]: Finished difference. Result has 308 places, 322 transitions, 4262 flow [2023-11-06 21:58:08,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4262, PETRI_PLACES=308, PETRI_TRANSITIONS=322} [2023-11-06 21:58:08,619 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2023-11-06 21:58:08,619 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 322 transitions, 4262 flow [2023-11-06 21:58:08,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.46666666666667) internal successors, (1177), 15 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:08,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:08,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:08,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:08,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:08,820 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)] === [2023-11-06 21:58:08,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1461776852, now seen corresponding path program 19 times [2023-11-06 21:58:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:08,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152636568] [2023-11-06 21:58:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152636568] [2023-11-06 21:58:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152636568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512637101] [2023-11-06 21:58:09,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:58:09,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:09,640 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:09,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 21:58:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:10,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:58:10,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:10,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512637101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:11,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 21:58:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349856582] [2023-11-06 21:58:11,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:11,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:58:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:58:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:58:13,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:58:13,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 322 transitions, 4262 flow. Second operand has 20 states, 20 states have (on average 70.8) internal successors, (1416), 20 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) [2023-11-06 21:58:13,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:13,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:58:13,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:17,785 INFO L124 PetriNetUnfolderBase]: 721/1389 cut-off events. [2023-11-06 21:58:17,785 INFO L125 PetriNetUnfolderBase]: For 30738/30738 co-relation queries the response was YES. [2023-11-06 21:58:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10611 conditions, 1389 events. 721/1389 cut-off events. For 30738/30738 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8378 event pairs, 72 based on Foata normal form. 2/1363 useless extension candidates. Maximal degree in co-relation 10510. Up to 1111 conditions per place. [2023-11-06 21:58:17,800 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 269 selfloop transitions, 106 changer transitions 11/386 dead transitions. [2023-11-06 21:58:17,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 386 transitions, 6052 flow [2023-11-06 21:58:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:58:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:58:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1917 transitions. [2023-11-06 21:58:17,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073523161920952 [2023-11-06 21:58:17,805 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1917 transitions. [2023-11-06 21:58:17,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1917 transitions. [2023-11-06 21:58:17,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:17,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1917 transitions. [2023-11-06 21:58:17,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.73076923076923) internal successors, (1917), 26 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:17,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:17,814 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:17,815 INFO L175 Difference]: Start difference. First operand has 308 places, 322 transitions, 4262 flow. Second operand 26 states and 1917 transitions. [2023-11-06 21:58:17,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 386 transitions, 6052 flow [2023-11-06 21:58:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 386 transitions, 5671 flow, removed 165 selfloop flow, removed 9 redundant places. [2023-11-06 21:58:18,096 INFO L231 Difference]: Finished difference. Result has 329 places, 340 transitions, 4837 flow [2023-11-06 21:58:18,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4837, PETRI_PLACES=329, PETRI_TRANSITIONS=340} [2023-11-06 21:58:18,096 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 300 predicate places. [2023-11-06 21:58:18,097 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 340 transitions, 4837 flow [2023-11-06 21:58:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.8) internal successors, (1416), 20 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) [2023-11-06 21:58:18,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:18,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:18,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 21:58:18,298 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:58:18,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 514259380, now seen corresponding path program 20 times [2023-11-06 21:58:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:18,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461351638] [2023-11-06 21:58:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461351638] [2023-11-06 21:58:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461351638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767127231] [2023-11-06 21:58:18,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:18,896 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:18,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 21:58:19,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:19,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:19,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:58:19,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:19,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767127231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:20,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 21:58:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004320217] [2023-11-06 21:58:20,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:58:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:58:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:58:21,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:58:21,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 340 transitions, 4837 flow. Second operand has 20 states, 20 states have (on average 70.9) internal successors, (1418), 20 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:21,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:21,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:58:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:26,895 INFO L124 PetriNetUnfolderBase]: 759/1465 cut-off events. [2023-11-06 21:58:26,895 INFO L125 PetriNetUnfolderBase]: For 28653/28653 co-relation queries the response was YES. [2023-11-06 21:58:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11145 conditions, 1465 events. 759/1465 cut-off events. For 28653/28653 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8968 event pairs, 69 based on Foata normal form. 3/1440 useless extension candidates. Maximal degree in co-relation 11039. Up to 1132 conditions per place. [2023-11-06 21:58:26,910 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 303 selfloop transitions, 95 changer transitions 18/416 dead transitions. [2023-11-06 21:58:26,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 416 transitions, 6292 flow [2023-11-06 21:58:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:58:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:58:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1930 transitions. [2023-11-06 21:58:26,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41011474713132173 [2023-11-06 21:58:26,914 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1930 transitions. [2023-11-06 21:58:26,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1930 transitions. [2023-11-06 21:58:26,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:26,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1930 transitions. [2023-11-06 21:58:26,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.23076923076923) internal successors, (1930), 26 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:26,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:26,920 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:26,921 INFO L175 Difference]: Start difference. First operand has 329 places, 340 transitions, 4837 flow. Second operand 26 states and 1930 transitions. [2023-11-06 21:58:26,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 416 transitions, 6292 flow [2023-11-06 21:58:27,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 416 transitions, 5794 flow, removed 197 selfloop flow, removed 21 redundant places. [2023-11-06 21:58:27,141 INFO L231 Difference]: Finished difference. Result has 340 places, 352 transitions, 4841 flow [2023-11-06 21:58:27,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4841, PETRI_PLACES=340, PETRI_TRANSITIONS=352} [2023-11-06 21:58:27,142 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-11-06 21:58:27,142 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 352 transitions, 4841 flow [2023-11-06 21:58:27,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.9) internal successors, (1418), 20 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:27,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:27,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:27,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 21:58:27,343 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:58:27,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1913780498, now seen corresponding path program 21 times [2023-11-06 21:58:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850834171] [2023-11-06 21:58:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:28,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:28,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850834171] [2023-11-06 21:58:28,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850834171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:28,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32424988] [2023-11-06 21:58:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:58:28,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:28,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:28,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 21:58:28,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:58:28,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:28,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:58:28,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:28,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32424988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:32,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 21:58:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366648830] [2023-11-06 21:58:32,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:58:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:58:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:58:36,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 181 [2023-11-06 21:58:36,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 352 transitions, 4841 flow. Second operand has 22 states, 22 states have (on average 70.81818181818181) internal successors, (1558), 22 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:36,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 181 [2023-11-06 21:58:36,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:42,228 INFO L124 PetriNetUnfolderBase]: 759/1469 cut-off events. [2023-11-06 21:58:42,228 INFO L125 PetriNetUnfolderBase]: For 25072/25072 co-relation queries the response was YES. [2023-11-06 21:58:42,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11178 conditions, 1469 events. 759/1469 cut-off events. For 25072/25072 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 9036 event pairs, 44 based on Foata normal form. 4/1445 useless extension candidates. Maximal degree in co-relation 11067. Up to 1092 conditions per place. [2023-11-06 21:58:42,245 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 290 selfloop transitions, 123 changer transitions 15/428 dead transitions. [2023-11-06 21:58:42,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 428 transitions, 6149 flow [2023-11-06 21:58:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:58:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 21:58:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2079 transitions. [2023-11-06 21:58:42,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102209944751381 [2023-11-06 21:58:42,249 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2079 transitions. [2023-11-06 21:58:42,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2079 transitions. [2023-11-06 21:58:42,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:42,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2079 transitions. [2023-11-06 21:58:42,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 74.25) internal successors, (2079), 28 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:42,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 181.0) internal successors, (5249), 29 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:42,259 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 181.0) internal successors, (5249), 29 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:42,259 INFO L175 Difference]: Start difference. First operand has 340 places, 352 transitions, 4841 flow. Second operand 28 states and 2079 transitions. [2023-11-06 21:58:42,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 428 transitions, 6149 flow [2023-11-06 21:58:42,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 428 transitions, 5913 flow, removed 81 selfloop flow, removed 17 redundant places. [2023-11-06 21:58:42,497 INFO L231 Difference]: Finished difference. Result has 351 places, 356 transitions, 5001 flow [2023-11-06 21:58:42,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5001, PETRI_PLACES=351, PETRI_TRANSITIONS=356} [2023-11-06 21:58:42,497 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 322 predicate places. [2023-11-06 21:58:42,498 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 356 transitions, 5001 flow [2023-11-06 21:58:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 70.81818181818181) internal successors, (1558), 22 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:42,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:42,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:42,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 21:58:42,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 21:58:42,700 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:58:42,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash 696170880, now seen corresponding path program 4 times [2023-11-06 21:58:42,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:42,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374056573] [2023-11-06 21:58:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:42,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374056573] [2023-11-06 21:58:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374056573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978704378] [2023-11-06 21:58:42,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:58:42,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:42,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:42,996 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:43,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47758f45-0e82-407c-a193-71a5a260e391/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 21:58:43,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:58:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:43,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:58:43,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:43,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:49,808 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_~x_1~0 4294967296))) (let ((.cse2 (+ .cse4 4294967296)) (.cse1 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse5 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse0 (+ (* 2863311531 v_z_277) (* v_y_277 4294967296))) (.cse3 (+ .cse5 v_z_277))) (or (< .cse0 0) (< .cse1 .cse0) (= .cse2 .cse3) (< v_z_277 0) (= .cse4 .cse3) (< 4294967295 v_z_277)))) (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse6 (+ (* 2863311531 v_z_277) (* v_y_277 4294967296))) (.cse7 (+ .cse5 v_z_277))) (or (< .cse6 0) (< .cse1 .cse6) (= .cse2 .cse7) (< .cse7 4294967296) (< 4294967295 v_z_277)))) (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse8 (+ (* 2863311531 v_z_277) (* v_y_277 4294967296))) (.cse9 (+ .cse5 v_z_277))) (or (< .cse8 0) (< .cse1 .cse8) (< 4294967295 .cse9) (< v_z_277 0) (= .cse4 .cse9))))))) is different from false [2023-11-06 21:59:03,780 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse0 (+ .cse2 v_z_277))) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (< 4294967295 .cse0) (< v_z_277 0) (= .cse1 .cse0)))) (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse3 (+ .cse2 v_z_277))) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (= (+ .cse1 4294967296) .cse3) (< v_z_277 0) (= .cse1 .cse3) (< 4294967295 v_z_277)))) (forall ((v_z_277 Int) (v_y_277 Int)) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (< (+ .cse2 v_z_277) 4294967296) (< 4294967295 v_z_277))))) is different from false [2023-11-06 21:59:15,978 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_277 Int) (v_y_277 Int)) (let ((.cse0 (+ .cse2 v_z_277))) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (< 4294967295 .cse0) (< v_z_277 0) (= .cse1 .cse0)))) (forall ((v_z_277 Int) (v_y_277 Int)) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (< v_z_277 0) (= .cse1 (+ .cse2 v_z_277)) (< 4294967295 v_z_277))) (forall ((v_z_277 Int) (v_y_277 Int)) (or (not (= (+ (* 2863311531 v_z_277) (* v_y_277 4294967296)) 0)) (< (+ .cse2 v_z_277) 4294967296) (< 4294967295 v_z_277))))) is different from false [2023-11-06 21:59:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978704378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:44,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:44,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 18 [2023-11-06 21:59:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388146468] [2023-11-06 21:59:44,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:44,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:59:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:59:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=208, Unknown=5, NotChecked=96, Total=380 [2023-11-06 21:59:46,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:48,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:50,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:52,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:54,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:56,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:59:58,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:00:00,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:00:02,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:00:04,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:00:06,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:00:06,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 181 [2023-11-06 22:00:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 356 transitions, 5001 flow. Second operand has 20 states, 20 states have (on average 70.1) internal successors, (1402), 20 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:00:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 181 [2023-11-06 22:00:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand