./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:32:34,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:32:34,639 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:32:34,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:32:34,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:32:34,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:32:34,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:32:34,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:32:34,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:32:34,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:32:34,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:32:34,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:32:34,681 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:32:34,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:32:34,682 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:32:34,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:32:34,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:32:34,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:32:34,684 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:32:34,685 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:32:34,685 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:32:34,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:32:34,687 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:32:34,687 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:32:34,688 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:32:34,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:32:34,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:32:34,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:32:34,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:32:34,691 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:32:34,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:34,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:32:34,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:32:34,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:32:34,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:32:34,694 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:32:34,695 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:32:34,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:32:34,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:32:34,696 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_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2023-11-23 22:32:35,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:32:35,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:32:35,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:32:35,073 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:32:35,073 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:32:35,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-23 22:32:38,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:32:38,831 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:32:38,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-23 22:32:38,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/data/5e447eeb4/0cf0d8ed5edd4c92b73708cb8c0ccd54/FLAGd3c389e37 [2023-11-23 22:32:38,890 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/data/5e447eeb4/0cf0d8ed5edd4c92b73708cb8c0ccd54 [2023-11-23 22:32:38,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:32:38,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:32:38,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:38,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:32:38,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:32:38,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:38" (1/1) ... [2023-11-23 22:32:38,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2096bde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:38, skipping insertion in model container [2023-11-23 22:32:38,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:38" (1/1) ... [2023-11-23 22:32:38,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:32:39,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:39,648 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:32:39,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:39,834 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:32:39,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39 WrapperNode [2023-11-23 22:32:39,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:39,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:39,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:32:39,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:32:39,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,912 INFO L138 Inliner]: procedures = 278, calls = 42, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 167 [2023-11-23 22:32:39,912 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:39,913 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:32:39,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:32:39,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:32:39,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:32:39,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:32:39,989 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:32:39,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:32:39,990 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (1/1) ... [2023-11-23 22:32:39,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:40,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:40,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:32:40,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:32:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:32:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:32:40,092 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:32:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:32:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:32:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:32:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:32:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:32:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:32:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:32:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:32:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:32:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:32:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:32:40,098 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:32:40,325 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:32:40,328 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:32:40,757 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:32:41,131 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:32:41,131 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:32:41,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:41 BoogieIcfgContainer [2023-11-23 22:32:41,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:32:41,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:32:41,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:32:41,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:32:41,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:32:38" (1/3) ... [2023-11-23 22:32:41,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad82898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:41, skipping insertion in model container [2023-11-23 22:32:41,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:39" (2/3) ... [2023-11-23 22:32:41,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad82898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:41, skipping insertion in model container [2023-11-23 22:32:41,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:41" (3/3) ... [2023-11-23 22:32:41,146 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-11-23 22:32:41,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:32:41,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-23 22:32:41,166 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:32:41,247 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:32:41,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 68 transitions, 150 flow [2023-11-23 22:32:41,346 INFO L124 PetriNetUnfolderBase]: 9/66 cut-off events. [2023-11-23 22:32:41,348 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:32:41,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 9/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2023-11-23 22:32:41,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 68 transitions, 150 flow [2023-11-23 22:32:41,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 65 transitions, 142 flow [2023-11-23 22:32:41,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:32:41,405 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;@5f34988f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:32:41,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-23 22:32:41,409 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:32:41,410 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-23 22:32:41,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:32:41,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:41,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:32:41,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:41,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash 14454, now seen corresponding path program 1 times [2023-11-23 22:32:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147718889] [2023-11-23 22:32:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147718889] [2023-11-23 22:32:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147718889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:41,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:41,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133100791] [2023-11-23 22:32:41,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:42,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-23 22:32:42,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-23 22:32:42,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:42,479 INFO L124 PetriNetUnfolderBase]: 734/1430 cut-off events. [2023-11-23 22:32:42,479 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-23 22:32:42,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 1430 events. 734/1430 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8263 event pairs, 562 based on Foata normal form. 138/1339 useless extension candidates. Maximal degree in co-relation 2494. Up to 1129 conditions per place. [2023-11-23 22:32:42,501 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-23 22:32:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 194 flow [2023-11-23 22:32:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-23 22:32:42,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-23 22:32:42,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-23 22:32:42,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-23 22:32:42,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:42,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-23 22:32:42,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,537 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 142 flow. Second operand 3 states and 115 transitions. [2023-11-23 22:32:42,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 194 flow [2023-11-23 22:32:42,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:32:42,552 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2023-11-23 22:32:42,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-23 22:32:42,562 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-11-23 22:32:42,563 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2023-11-23 22:32:42,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:42,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:32:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:32:42,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:42,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 14455, now seen corresponding path program 1 times [2023-11-23 22:32:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588556368] [2023-11-23 22:32:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588556368] [2023-11-23 22:32:42,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588556368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:42,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:42,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536026788] [2023-11-23 22:32:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:42,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-23 22:32:42,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:42,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:42,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-23 22:32:42,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:43,030 INFO L124 PetriNetUnfolderBase]: 459/955 cut-off events. [2023-11-23 22:32:43,030 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-23 22:32:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 955 events. 459/955 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5343 event pairs, 342 based on Foata normal form. 122/914 useless extension candidates. Maximal degree in co-relation 1695. Up to 732 conditions per place. [2023-11-23 22:32:43,039 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-23 22:32:43,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 182 flow [2023-11-23 22:32:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-23 22:32:43,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-23 22:32:43,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:43,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,049 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 3 states and 115 transitions. [2023-11-23 22:32:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 182 flow [2023-11-23 22:32:43,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:32:43,052 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 118 flow [2023-11-23 22:32:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-23 22:32:43,053 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-23 22:32:43,054 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 118 flow [2023-11-23 22:32:43,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:43,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:32:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:32:43,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:43,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 431069916, now seen corresponding path program 1 times [2023-11-23 22:32:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345152631] [2023-11-23 22:32:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:43,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:43,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:43,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345152631] [2023-11-23 22:32:43,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345152631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:43,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:43,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:43,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659710369] [2023-11-23 22:32:43,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:43,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-23 22:32:43,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:43,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-23 22:32:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:43,315 INFO L124 PetriNetUnfolderBase]: 484/998 cut-off events. [2023-11-23 22:32:43,316 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-23 22:32:43,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 998 events. 484/998 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5571 event pairs, 362 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 1785. Up to 779 conditions per place. [2023-11-23 22:32:43,325 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-23 22:32:43,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 182 flow [2023-11-23 22:32:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-23 22:32:43,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-23 22:32:43,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-23 22:32:43,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-23 22:32:43,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:43,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-23 22:32:43,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,331 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 118 flow. Second operand 3 states and 111 transitions. [2023-11-23 22:32:43,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 182 flow [2023-11-23 22:32:43,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:32:43,334 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2023-11-23 22:32:43,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-11-23 22:32:43,335 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-11-23 22:32:43,336 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2023-11-23 22:32:43,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:43,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:32:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:32:43,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:43,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash 431069917, now seen corresponding path program 1 times [2023-11-23 22:32:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:43,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227280068] [2023-11-23 22:32:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:43,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227280068] [2023-11-23 22:32:43,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227280068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:43,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:43,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877092511] [2023-11-23 22:32:43,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:43,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:43,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:43,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-23 22:32:43,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:43,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-23 22:32:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:43,632 INFO L124 PetriNetUnfolderBase]: 459/943 cut-off events. [2023-11-23 22:32:43,632 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-23 22:32:43,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 943 events. 459/943 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5200 event pairs, 342 based on Foata normal form. 21/813 useless extension candidates. Maximal degree in co-relation 1683. Up to 732 conditions per place. [2023-11-23 22:32:43,641 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-23 22:32:43,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 174 flow [2023-11-23 22:32:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-23 22:32:43,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-23 22:32:43,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:43,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-23 22:32:43,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,647 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 115 transitions. [2023-11-23 22:32:43,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 174 flow [2023-11-23 22:32:43,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:32:43,649 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-11-23 22:32:43,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-11-23 22:32:43,651 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-23 22:32:43,651 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-11-23 22:32:43,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:43,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:32:43,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:43,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1398530870, now seen corresponding path program 1 times [2023-11-23 22:32:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:43,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385306378] [2023-11-23 22:32:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385306378] [2023-11-23 22:32:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385306378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:43,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911125331] [2023-11-23 22:32:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:44,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2023-11-23 22:32:44,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:44,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2023-11-23 22:32:44,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:44,355 INFO L124 PetriNetUnfolderBase]: 734/1353 cut-off events. [2023-11-23 22:32:44,356 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:32:44,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 1353 events. 734/1353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7461 event pairs, 402 based on Foata normal form. 0/1170 useless extension candidates. Maximal degree in co-relation 2490. Up to 801 conditions per place. [2023-11-23 22:32:44,367 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 46 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-11-23 22:32:44,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 241 flow [2023-11-23 22:32:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:32:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:32:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2023-11-23 22:32:44,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698529411764706 [2023-11-23 22:32:44,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 155 transitions. [2023-11-23 22:32:44,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 155 transitions. [2023-11-23 22:32:44,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:44,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 155 transitions. [2023-11-23 22:32:44,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,375 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 4 states and 155 transitions. [2023-11-23 22:32:44,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 241 flow [2023-11-23 22:32:44,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:32:44,378 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 112 flow [2023-11-23 22:32:44,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-23 22:32:44,379 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-23 22:32:44,380 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 112 flow [2023-11-23 22:32:44,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:44,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:44,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:32:44,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:44,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1398530869, now seen corresponding path program 1 times [2023-11-23 22:32:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:44,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275555433] [2023-11-23 22:32:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:44,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:44,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275555433] [2023-11-23 22:32:44,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275555433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:44,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707065279] [2023-11-23 22:32:44,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:44,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:32:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:32:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:32:44,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:32:44,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:44,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:44,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:32:44,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:45,402 INFO L124 PetriNetUnfolderBase]: 755/1431 cut-off events. [2023-11-23 22:32:45,403 INFO L125 PetriNetUnfolderBase]: For 49/50 co-relation queries the response was YES. [2023-11-23 22:32:45,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 1431 events. 755/1431 cut-off events. For 49/50 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7992 event pairs, 125 based on Foata normal form. 0/1251 useless extension candidates. Maximal degree in co-relation 999. Up to 849 conditions per place. [2023-11-23 22:32:45,418 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 88 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-11-23 22:32:45,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 114 transitions, 443 flow [2023-11-23 22:32:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:32:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:32:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2023-11-23 22:32:45,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2023-11-23 22:32:45,422 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 296 transitions. [2023-11-23 22:32:45,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 296 transitions. [2023-11-23 22:32:45,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:45,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 296 transitions. [2023-11-23 22:32:45,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.285714285714285) internal successors, (296), 7 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,428 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,429 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 112 flow. Second operand 7 states and 296 transitions. [2023-11-23 22:32:45,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 114 transitions, 443 flow [2023-11-23 22:32:45,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 114 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:32:45,437 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 170 flow [2023-11-23 22:32:45,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-23 22:32:45,441 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-11-23 22:32:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 170 flow [2023-11-23 22:32:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:45,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:32:45,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:45,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1300549365, now seen corresponding path program 1 times [2023-11-23 22:32:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:45,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016948890] [2023-11-23 22:32:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:45,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016948890] [2023-11-23 22:32:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016948890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:45,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085326556] [2023-11-23 22:32:45,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:45,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:32:45,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:45,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:32:45,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:45,836 INFO L124 PetriNetUnfolderBase]: 642/1270 cut-off events. [2023-11-23 22:32:45,836 INFO L125 PetriNetUnfolderBase]: For 102/103 co-relation queries the response was YES. [2023-11-23 22:32:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2565 conditions, 1270 events. 642/1270 cut-off events. For 102/103 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6585 event pairs, 269 based on Foata normal form. 16/1166 useless extension candidates. Maximal degree in co-relation 2522. Up to 756 conditions per place. [2023-11-23 22:32:45,848 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 51 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-23 22:32:45,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 70 transitions, 286 flow [2023-11-23 22:32:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2023-11-23 22:32:45,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2023-11-23 22:32:45,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2023-11-23 22:32:45,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2023-11-23 22:32:45,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:45,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2023-11-23 22:32:45,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,854 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 170 flow. Second operand 3 states and 138 transitions. [2023-11-23 22:32:45,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 70 transitions, 286 flow [2023-11-23 22:32:45,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 284 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:45,861 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 155 flow [2023-11-23 22:32:45,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-11-23 22:32:45,863 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -4 predicate places. [2023-11-23 22:32:45,864 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 155 flow [2023-11-23 22:32:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:45,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:32:45,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:45,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1364072656, now seen corresponding path program 1 times [2023-11-23 22:32:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569379419] [2023-11-23 22:32:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:45,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:45,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569379419] [2023-11-23 22:32:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569379419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:45,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914251799] [2023-11-23 22:32:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:45,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:45,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:32:45,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:45,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:45,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:32:45,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:46,362 INFO L124 PetriNetUnfolderBase]: 886/1730 cut-off events. [2023-11-23 22:32:46,362 INFO L125 PetriNetUnfolderBase]: For 126/127 co-relation queries the response was YES. [2023-11-23 22:32:46,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 1730 events. 886/1730 cut-off events. For 126/127 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9685 event pairs, 375 based on Foata normal form. 0/1615 useless extension candidates. Maximal degree in co-relation 1298. Up to 859 conditions per place. [2023-11-23 22:32:46,378 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 71 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-23 22:32:46,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 403 flow [2023-11-23 22:32:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:32:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:32:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2023-11-23 22:32:46,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948529411764706 [2023-11-23 22:32:46,381 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 189 transitions. [2023-11-23 22:32:46,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 189 transitions. [2023-11-23 22:32:46,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:46,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 189 transitions. [2023-11-23 22:32:46,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,383 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,384 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 155 flow. Second operand 4 states and 189 transitions. [2023-11-23 22:32:46,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 403 flow [2023-11-23 22:32:46,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 95 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:46,392 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 186 flow [2023-11-23 22:32:46,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-23 22:32:46,400 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-23 22:32:46,400 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 186 flow [2023-11-23 22:32:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:46,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:46,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:32:46,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:46,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:46,402 INFO L85 PathProgramCache]: Analyzing trace with hash 468170157, now seen corresponding path program 1 times [2023-11-23 22:32:46,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:46,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81612859] [2023-11-23 22:32:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:46,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81612859] [2023-11-23 22:32:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81612859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:46,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652718251] [2023-11-23 22:32:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:46,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:32:46,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:46,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:32:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:46,800 INFO L124 PetriNetUnfolderBase]: 910/1802 cut-off events. [2023-11-23 22:32:46,801 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-23 22:32:46,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 1802 events. 910/1802 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10253 event pairs, 672 based on Foata normal form. 12/1672 useless extension candidates. Maximal degree in co-relation 2870. Up to 1188 conditions per place. [2023-11-23 22:32:46,819 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 56 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-23 22:32:46,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 350 flow [2023-11-23 22:32:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-23 22:32:46,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-23 22:32:46,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-23 22:32:46,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-23 22:32:46,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:46,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-23 22:32:46,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,824 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 186 flow. Second operand 3 states and 143 transitions. [2023-11-23 22:32:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 350 flow [2023-11-23 22:32:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 345 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:46,830 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 188 flow [2023-11-23 22:32:46,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-23 22:32:46,832 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-23 22:32:46,832 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 188 flow [2023-11-23 22:32:46,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:46,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:46,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:32:46,834 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:46,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -462310205, now seen corresponding path program 1 times [2023-11-23 22:32:46,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398921316] [2023-11-23 22:32:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398921316] [2023-11-23 22:32:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398921316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065134109] [2023-11-23 22:32:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:47,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:47,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:47,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:47,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:32:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:47,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 22:32:47,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:47,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 22:32:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:47,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-23 22:32:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:48,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065134109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:48,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-23 22:32:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831213955] [2023-11-23 22:32:48,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:32:48,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:32:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:32:48,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:32:48,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 188 flow. Second operand has 16 states, 16 states have (on average 30.875) internal successors, (494), 16 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) [2023-11-23 22:32:48,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:48,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:32:48,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:51,451 INFO L124 PetriNetUnfolderBase]: 4138/7884 cut-off events. [2023-11-23 22:32:51,452 INFO L125 PetriNetUnfolderBase]: For 2315/2315 co-relation queries the response was YES. [2023-11-23 22:32:51,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 7884 events. 4138/7884 cut-off events. For 2315/2315 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 53001 event pairs, 225 based on Foata normal form. 192/7553 useless extension candidates. Maximal degree in co-relation 7276. Up to 1425 conditions per place. [2023-11-23 22:32:51,539 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 349 selfloop transitions, 45 changer transitions 0/412 dead transitions. [2023-11-23 22:32:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 412 transitions, 1963 flow [2023-11-23 22:32:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 22:32:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 22:32:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1034 transitions. [2023-11-23 22:32:51,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611253196930946 [2023-11-23 22:32:51,550 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1034 transitions. [2023-11-23 22:32:51,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1034 transitions. [2023-11-23 22:32:51,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:51,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1034 transitions. [2023-11-23 22:32:51,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 44.95652173913044) internal successors, (1034), 23 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:51,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:51,562 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:51,563 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 188 flow. Second operand 23 states and 1034 transitions. [2023-11-23 22:32:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 412 transitions, 1963 flow [2023-11-23 22:32:51,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 412 transitions, 1946 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:51,580 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 598 flow [2023-11-23 22:32:51,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=598, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2023-11-23 22:32:51,581 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2023-11-23 22:32:51,581 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 598 flow [2023-11-23 22:32:51,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 30.875) internal successors, (494), 16 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) [2023-11-23 22:32:51,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:51,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:51,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:51,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:51,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:51,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1084957283, now seen corresponding path program 1 times [2023-11-23 22:32:51,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:51,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592741394] [2023-11-23 22:32:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:51,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:51,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592741394] [2023-11-23 22:32:51,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592741394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:51,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676628741] [2023-11-23 22:32:51,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:51,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:51,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:32:51,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:51,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:51,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:32:51,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:52,563 INFO L124 PetriNetUnfolderBase]: 1833/3912 cut-off events. [2023-11-23 22:32:52,563 INFO L125 PetriNetUnfolderBase]: For 2248/2248 co-relation queries the response was YES. [2023-11-23 22:32:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9453 conditions, 3912 events. 1833/3912 cut-off events. For 2248/2248 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23859 event pairs, 372 based on Foata normal form. 234/3987 useless extension candidates. Maximal degree in co-relation 9251. Up to 2311 conditions per place. [2023-11-23 22:32:52,610 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 71 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-23 22:32:52,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 617 flow [2023-11-23 22:32:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:32:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-23 22:32:52,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-23 22:32:52,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-23 22:32:52,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-23 22:32:52,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:52,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-23 22:32:52,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,615 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 598 flow. Second operand 3 states and 131 transitions. [2023-11-23 22:32:52,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 617 flow [2023-11-23 22:32:52,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 561 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-11-23 22:32:52,637 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 387 flow [2023-11-23 22:32:52,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-11-23 22:32:52,638 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-23 22:32:52,638 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 387 flow [2023-11-23 22:32:52,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:32:52,639 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:52,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash 357483775, now seen corresponding path program 1 times [2023-11-23 22:32:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061164976] [2023-11-23 22:32:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:52,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:52,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061164976] [2023-11-23 22:32:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061164976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:52,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831202574] [2023-11-23 22:32:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:52,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:32:52,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:52,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:32:52,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:53,495 INFO L124 PetriNetUnfolderBase]: 1838/3867 cut-off events. [2023-11-23 22:32:53,496 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-11-23 22:32:53,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9473 conditions, 3867 events. 1838/3867 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23531 event pairs, 1002 based on Foata normal form. 0/3738 useless extension candidates. Maximal degree in co-relation 8898. Up to 2166 conditions per place. [2023-11-23 22:32:53,538 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 56 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2023-11-23 22:32:53,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 565 flow [2023-11-23 22:32:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:32:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-23 22:32:53,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538235294117647 [2023-11-23 22:32:53,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-23 22:32:53,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-23 22:32:53,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:53,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-23 22:32:53,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:53,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:53,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:53,544 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 387 flow. Second operand 5 states and 183 transitions. [2023-11-23 22:32:53,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 565 flow [2023-11-23 22:32:53,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 561 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:53,560 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 419 flow [2023-11-23 22:32:53,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2023-11-23 22:32:53,561 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 27 predicate places. [2023-11-23 22:32:53,562 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 419 flow [2023-11-23 22:32:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:53,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:53,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:32:53,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:53,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1003913070, now seen corresponding path program 1 times [2023-11-23 22:32:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473561686] [2023-11-23 22:32:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473561686] [2023-11-23 22:32:53,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473561686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:53,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:53,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:32:53,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720984180] [2023-11-23 22:32:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:53,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:32:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:32:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:32:54,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:32:54,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 82 transitions, 419 flow. Second operand has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:54,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:54,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:32:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:55,147 INFO L124 PetriNetUnfolderBase]: 1961/4072 cut-off events. [2023-11-23 22:32:55,148 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2023-11-23 22:32:55,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10111 conditions, 4072 events. 1961/4072 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24604 event pairs, 461 based on Foata normal form. 0/3908 useless extension candidates. Maximal degree in co-relation 9074. Up to 2946 conditions per place. [2023-11-23 22:32:55,199 INFO L140 encePairwiseOnDemand]: 59/68 looper letters, 112 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2023-11-23 22:32:55,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 839 flow [2023-11-23 22:32:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:32:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:32:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 317 transitions. [2023-11-23 22:32:55,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827205882352942 [2023-11-23 22:32:55,204 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 317 transitions. [2023-11-23 22:32:55,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 317 transitions. [2023-11-23 22:32:55,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:55,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 317 transitions. [2023-11-23 22:32:55,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.625) internal successors, (317), 8 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,211 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,211 INFO L175 Difference]: Start difference. First operand has 90 places, 82 transitions, 419 flow. Second operand 8 states and 317 transitions. [2023-11-23 22:32:55,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 839 flow [2023-11-23 22:32:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 791 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:32:55,233 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 440 flow [2023-11-23 22:32:55,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-11-23 22:32:55,235 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-11-23 22:32:55,235 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 440 flow [2023-11-23 22:32:55,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:55,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:55,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:32:55,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:55,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1715509600, now seen corresponding path program 1 times [2023-11-23 22:32:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610600317] [2023-11-23 22:32:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:55,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610600317] [2023-11-23 22:32:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610600317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437381974] [2023-11-23 22:32:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:55,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:32:55,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:55,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:32:55,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:56,197 INFO L124 PetriNetUnfolderBase]: 2280/4738 cut-off events. [2023-11-23 22:32:56,197 INFO L125 PetriNetUnfolderBase]: For 2330/2330 co-relation queries the response was YES. [2023-11-23 22:32:56,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 4738 events. 2280/4738 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 29912 event pairs, 386 based on Foata normal form. 56/4670 useless extension candidates. Maximal degree in co-relation 10130. Up to 1920 conditions per place. [2023-11-23 22:32:56,240 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 108 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2023-11-23 22:32:56,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 136 transitions, 904 flow [2023-11-23 22:32:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:32:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2023-11-23 22:32:56,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294117647058823 [2023-11-23 22:32:56,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 214 transitions. [2023-11-23 22:32:56,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 214 transitions. [2023-11-23 22:32:56,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:56,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 214 transitions. [2023-11-23 22:32:56,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:56,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:56,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:56,246 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 440 flow. Second operand 5 states and 214 transitions. [2023-11-23 22:32:56,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 136 transitions, 904 flow [2023-11-23 22:32:56,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 136 transitions, 893 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-23 22:32:56,270 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 507 flow [2023-11-23 22:32:56,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2023-11-23 22:32:56,272 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2023-11-23 22:32:56,272 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 507 flow [2023-11-23 22:32:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:56,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:56,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:32:56,273 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:56,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1670774954, now seen corresponding path program 1 times [2023-11-23 22:32:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:56,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206480395] [2023-11-23 22:32:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:56,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206480395] [2023-11-23 22:32:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206480395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:32:56,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103011658] [2023-11-23 22:32:56,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:32:56,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:32:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:32:57,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-23 22:32:57,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 507 flow. Second operand has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:57,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:32:57,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-23 22:32:57,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:32:58,822 INFO L124 PetriNetUnfolderBase]: 3381/7065 cut-off events. [2023-11-23 22:32:58,822 INFO L125 PetriNetUnfolderBase]: For 5502/5503 co-relation queries the response was YES. [2023-11-23 22:32:58,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 7065 events. 3381/7065 cut-off events. For 5502/5503 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 45539 event pairs, 1132 based on Foata normal form. 0/6899 useless extension candidates. Maximal degree in co-relation 14770. Up to 3958 conditions per place. [2023-11-23 22:32:58,889 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 168 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2023-11-23 22:32:58,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 197 transitions, 1340 flow [2023-11-23 22:32:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:32:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:32:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 390 transitions. [2023-11-23 22:32:58,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5735294117647058 [2023-11-23 22:32:58,893 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 390 transitions. [2023-11-23 22:32:58,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 390 transitions. [2023-11-23 22:32:58,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:32:58,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 390 transitions. [2023-11-23 22:32:58,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.0) internal successors, (390), 10 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:58,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:58,898 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:58,898 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 507 flow. Second operand 10 states and 390 transitions. [2023-11-23 22:32:58,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 197 transitions, 1340 flow [2023-11-23 22:32:58,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 197 transitions, 1334 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:32:58,942 INFO L231 Difference]: Finished difference. Result has 112 places, 101 transitions, 626 flow [2023-11-23 22:32:58,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=626, PETRI_PLACES=112, PETRI_TRANSITIONS=101} [2023-11-23 22:32:58,945 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 49 predicate places. [2023-11-23 22:32:58,945 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 101 transitions, 626 flow [2023-11-23 22:32:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:58,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:32:58,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:32:58,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:32:58,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2004815876, now seen corresponding path program 2 times [2023-11-23 22:32:58,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:58,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70430563] [2023-11-23 22:32:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70430563] [2023-11-23 22:32:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70430563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:59,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:32:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074323121] [2023-11-23 22:32:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:59,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:32:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:32:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:33:00,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-23 22:33:00,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 101 transitions, 626 flow. Second operand has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:00,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:00,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-23 22:33:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:02,787 INFO L124 PetriNetUnfolderBase]: 4282/8947 cut-off events. [2023-11-23 22:33:02,788 INFO L125 PetriNetUnfolderBase]: For 7927/7927 co-relation queries the response was YES. [2023-11-23 22:33:02,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24092 conditions, 8947 events. 4282/8947 cut-off events. For 7927/7927 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 59534 event pairs, 1483 based on Foata normal form. 0/8757 useless extension candidates. Maximal degree in co-relation 18631. Up to 3782 conditions per place. [2023-11-23 22:33:02,869 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 164 selfloop transitions, 21 changer transitions 0/201 dead transitions. [2023-11-23 22:33:02,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 201 transitions, 1439 flow [2023-11-23 22:33:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:33:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:33:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 417 transitions. [2023-11-23 22:33:02,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574866310160428 [2023-11-23 22:33:02,874 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 417 transitions. [2023-11-23 22:33:02,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 417 transitions. [2023-11-23 22:33:02,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:02,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 417 transitions. [2023-11-23 22:33:02,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 37.90909090909091) internal successors, (417), 11 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:02,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:02,882 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:02,883 INFO L175 Difference]: Start difference. First operand has 112 places, 101 transitions, 626 flow. Second operand 11 states and 417 transitions. [2023-11-23 22:33:02,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 201 transitions, 1439 flow [2023-11-23 22:33:02,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 201 transitions, 1428 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:33:02,944 INFO L231 Difference]: Finished difference. Result has 121 places, 106 transitions, 721 flow [2023-11-23 22:33:02,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=721, PETRI_PLACES=121, PETRI_TRANSITIONS=106} [2023-11-23 22:33:02,945 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2023-11-23 22:33:02,946 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 106 transitions, 721 flow [2023-11-23 22:33:02,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:02,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:02,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:33:02,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:33:02,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -43623815, now seen corresponding path program 1 times [2023-11-23 22:33:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:02,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708160806] [2023-11-23 22:33:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708160806] [2023-11-23 22:33:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708160806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:03,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540393053] [2023-11-23 22:33:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:33:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:33:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:33:03,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:33:03,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 106 transitions, 721 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:03,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:03,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:33:03,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:05,079 INFO L124 PetriNetUnfolderBase]: 5668/11854 cut-off events. [2023-11-23 22:33:05,079 INFO L125 PetriNetUnfolderBase]: For 13198/13198 co-relation queries the response was YES. [2023-11-23 22:33:05,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32732 conditions, 11854 events. 5668/11854 cut-off events. For 13198/13198 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 86204 event pairs, 2955 based on Foata normal form. 156/11751 useless extension candidates. Maximal degree in co-relation 25160. Up to 7687 conditions per place. [2023-11-23 22:33:05,304 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 150 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2023-11-23 22:33:05,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1537 flow [2023-11-23 22:33:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:33:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:33:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-23 22:33:05,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-23 22:33:05,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-23 22:33:05,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-23 22:33:05,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:05,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-23 22:33:05,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:05,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:05,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:05,310 INFO L175 Difference]: Start difference. First operand has 121 places, 106 transitions, 721 flow. Second operand 3 states and 143 transitions. [2023-11-23 22:33:05,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1537 flow [2023-11-23 22:33:05,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1473 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-23 22:33:05,412 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 697 flow [2023-11-23 22:33:05,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=697, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2023-11-23 22:33:05,413 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 54 predicate places. [2023-11-23 22:33:05,413 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 697 flow [2023-11-23 22:33:05,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:05,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:05,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:05,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 22:33:05,414 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:33:05,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1974750497, now seen corresponding path program 1 times [2023-11-23 22:33:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:05,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399622567] [2023-11-23 22:33:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:05,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399622567] [2023-11-23 22:33:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399622567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404537436] [2023-11-23 22:33:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:05,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:05,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:33:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:05,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:33:05,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:05,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:05,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404537436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:05,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:05,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-23 22:33:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697325809] [2023-11-23 22:33:05,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:05,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:33:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:33:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:33:05,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:33:05,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 697 flow. Second operand has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:05,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:05,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:33:05,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:08,508 INFO L124 PetriNetUnfolderBase]: 6748/14314 cut-off events. [2023-11-23 22:33:08,508 INFO L125 PetriNetUnfolderBase]: For 16656/16674 co-relation queries the response was YES. [2023-11-23 22:33:08,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41147 conditions, 14314 events. 6748/14314 cut-off events. For 16656/16674 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 100426 event pairs, 1379 based on Foata normal form. 218/14274 useless extension candidates. Maximal degree in co-relation 26344. Up to 2607 conditions per place. [2023-11-23 22:33:08,776 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 257 selfloop transitions, 35 changer transitions 0/311 dead transitions. [2023-11-23 22:33:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 311 transitions, 2332 flow [2023-11-23 22:33:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:33:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 22:33:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 465 transitions. [2023-11-23 22:33:08,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7598039215686274 [2023-11-23 22:33:08,779 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 465 transitions. [2023-11-23 22:33:08,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 465 transitions. [2023-11-23 22:33:08,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:08,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 465 transitions. [2023-11-23 22:33:08,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 51.666666666666664) internal successors, (465), 9 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:08,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:08,785 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 68.0) internal successors, (680), 10 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:08,785 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 697 flow. Second operand 9 states and 465 transitions. [2023-11-23 22:33:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 311 transitions, 2332 flow [2023-11-23 22:33:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 311 transitions, 2291 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:08,868 INFO L231 Difference]: Finished difference. Result has 129 places, 125 transitions, 967 flow [2023-11-23 22:33:08,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=967, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2023-11-23 22:33:08,869 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 66 predicate places. [2023-11-23 22:33:08,869 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 967 flow [2023-11-23 22:33:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:08,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:09,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:33:09,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1571441802, now seen corresponding path program 1 times [2023-11-23 22:33:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:09,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208066833] [2023-11-23 22:33:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:09,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:09,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208066833] [2023-11-23 22:33:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208066833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:09,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189145401] [2023-11-23 22:33:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:09,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:09,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:09,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:09,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:33:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:09,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 22:33:09,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:10,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189145401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:10,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:10,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2023-11-23 22:33:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529083254] [2023-11-23 22:33:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:33:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:33:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:33:10,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:33:10,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:10,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:33:10,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:14,847 INFO L124 PetriNetUnfolderBase]: 8993/18922 cut-off events. [2023-11-23 22:33:14,847 INFO L125 PetriNetUnfolderBase]: For 24287/24287 co-relation queries the response was YES. [2023-11-23 22:33:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54967 conditions, 18922 events. 8993/18922 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 138887 event pairs, 1780 based on Foata normal form. 0/18451 useless extension candidates. Maximal degree in co-relation 38876. Up to 4939 conditions per place. [2023-11-23 22:33:15,228 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 189 selfloop transitions, 79 changer transitions 0/286 dead transitions. [2023-11-23 22:33:15,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 286 transitions, 2435 flow [2023-11-23 22:33:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:33:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:33:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 455 transitions. [2023-11-23 22:33:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082887700534759 [2023-11-23 22:33:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 455 transitions. [2023-11-23 22:33:15,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 455 transitions. [2023-11-23 22:33:15,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:15,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 455 transitions. [2023-11-23 22:33:15,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,237 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,237 INFO L175 Difference]: Start difference. First operand has 129 places, 125 transitions, 967 flow. Second operand 11 states and 455 transitions. [2023-11-23 22:33:15,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 286 transitions, 2435 flow [2023-11-23 22:33:15,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 286 transitions, 2423 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:15,392 INFO L231 Difference]: Finished difference. Result has 146 places, 172 transitions, 1755 flow [2023-11-23 22:33:15,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1755, PETRI_PLACES=146, PETRI_TRANSITIONS=172} [2023-11-23 22:33:15,393 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 83 predicate places. [2023-11-23 22:33:15,393 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 172 transitions, 1755 flow [2023-11-23 22:33:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:15,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:15,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:15,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:33:15,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1684759712, now seen corresponding path program 1 times [2023-11-23 22:33:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936465254] [2023-11-23 22:33:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:15,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936465254] [2023-11-23 22:33:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936465254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777873410] [2023-11-23 22:33:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:15,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:15,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:15,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:33:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:15,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:33:15,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:16,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:16,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777873410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:16,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:16,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-23 22:33:16,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737017865] [2023-11-23 22:33:16,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:16,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:16,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-23 22:33:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 172 transitions, 1755 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-23 22:33:16,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:20,301 INFO L124 PetriNetUnfolderBase]: 8547/18128 cut-off events. [2023-11-23 22:33:20,301 INFO L125 PetriNetUnfolderBase]: For 35606/35606 co-relation queries the response was YES. [2023-11-23 22:33:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57834 conditions, 18128 events. 8547/18128 cut-off events. For 35606/35606 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 132509 event pairs, 2687 based on Foata normal form. 9/17782 useless extension candidates. Maximal degree in co-relation 40509. Up to 12663 conditions per place. [2023-11-23 22:33:20,524 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 183 selfloop transitions, 13 changer transitions 0/215 dead transitions. [2023-11-23 22:33:20,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 215 transitions, 2301 flow [2023-11-23 22:33:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:33:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2023-11-23 22:33:20,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2023-11-23 22:33:20,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 231 transitions. [2023-11-23 22:33:20,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 231 transitions. [2023-11-23 22:33:20,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:20,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 231 transitions. [2023-11-23 22:33:20,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,530 INFO L175 Difference]: Start difference. First operand has 146 places, 172 transitions, 1755 flow. Second operand 5 states and 231 transitions. [2023-11-23 22:33:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 215 transitions, 2301 flow [2023-11-23 22:33:20,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 215 transitions, 2263 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-11-23 22:33:20,756 INFO L231 Difference]: Finished difference. Result has 152 places, 167 transitions, 1729 flow [2023-11-23 22:33:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1729, PETRI_PLACES=152, PETRI_TRANSITIONS=167} [2023-11-23 22:33:20,757 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 89 predicate places. [2023-11-23 22:33:20,757 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 167 transitions, 1729 flow [2023-11-23 22:33:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:20,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:20,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 22:33:21,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:21,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-23 22:33:21,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash 461716345, now seen corresponding path program 1 times [2023-11-23 22:33:21,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353138964] [2023-11-23 22:33:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353138964] [2023-11-23 22:33:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353138964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:21,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895341331] [2023-11-23 22:33:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:21,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:21,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:21,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7175df03-36b6-403c-b984-0a83166dde09/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:33:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:21,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:33:21,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:21,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:21,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895341331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:21,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 22:33:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831395269] [2023-11-23 22:33:21,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:33:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:33:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:33:21,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-23 22:33:21,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 167 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 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) [2023-11-23 22:33:21,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:21,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-23 22:33:21,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand