./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:18,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:18,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:23:18,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:18,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:18,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:18,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:18,604 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:18,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:18,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:18,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:18,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:18,615 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:18,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:18,618 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:18,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:18,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:18,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:18,620 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:23:18,621 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:23:18,621 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:23:18,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:18,622 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:23:18,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:23:18,623 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:18,624 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:18,624 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:18,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:18,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:18,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:18,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:18,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:18,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:18,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:18,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:18,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:18,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:18,630 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:18,630 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_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2023-11-12 02:23:18,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:18,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:19,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:19,003 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:19,005 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:19,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-12 02:23:22,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:22,955 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:22,956 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-12 02:23:22,993 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/data/29689b9d1/603e68b18a8b46388e66b1a9ee4e8acb/FLAG9b9170c86 [2023-11-12 02:23:23,019 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/data/29689b9d1/603e68b18a8b46388e66b1a9ee4e8acb [2023-11-12 02:23:23,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:23,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:23,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:23,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:23,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:23,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a66307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23, skipping insertion in model container [2023-11-12 02:23:23,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,117 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:23,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:23,691 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:23,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:23,817 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:23,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23 WrapperNode [2023-11-12 02:23:23,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:23,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:23,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:23,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:23,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,848 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,879 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 154 [2023-11-12 02:23:23,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:23,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:23,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:23,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:23,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,924 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:23,925 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:23,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:23,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:23,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (1/1) ... [2023-11-12 02:23:23,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:23,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:24,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:23:24,037 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:23:24,039 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:23:24,039 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:23:24,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:23:24,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:23:24,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:23:24,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:23:24,041 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:23:24,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:24,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:24,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:24,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:24,043 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:23:24,222 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:24,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:24,634 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:24,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:24,645 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:23:24,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:24 BoogieIcfgContainer [2023-11-12 02:23:24,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:24,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:24,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:24,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:24,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:23" (1/3) ... [2023-11-12 02:23:24,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c472283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:24, skipping insertion in model container [2023-11-12 02:23:24,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:23" (2/3) ... [2023-11-12 02:23:24,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c472283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:24, skipping insertion in model container [2023-11-12 02:23:24,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:24" (3/3) ... [2023-11-12 02:23:24,665 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-11-12 02:23:24,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:24,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-12 02:23:24,687 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:23:24,858 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:23:24,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 185 transitions, 384 flow [2023-11-12 02:23:24,990 INFO L124 PetriNetUnfolderBase]: 12/183 cut-off events. [2023-11-12 02:23:24,991 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:23:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 12/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 502 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 137. Up to 3 conditions per place. [2023-11-12 02:23:25,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 185 transitions, 384 flow [2023-11-12 02:23:25,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 178 transitions, 368 flow [2023-11-12 02:23:25,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:23:25,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 178 transitions, 368 flow [2023-11-12 02:23:25,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 178 transitions, 368 flow [2023-11-12 02:23:25,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 178 transitions, 368 flow [2023-11-12 02:23:25,140 INFO L124 PetriNetUnfolderBase]: 12/178 cut-off events. [2023-11-12 02:23:25,141 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:23:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 12/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 499 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 137. Up to 3 conditions per place. [2023-11-12 02:23:25,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 10228 [2023-11-12 02:23:32,349 INFO L134 LiptonReduction]: Checked pairs total: 14444 [2023-11-12 02:23:32,362 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-12 02:23:32,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:32,408 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;@4a1bb6ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:32,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-12 02:23:32,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:23:32,412 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:23:32,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:32,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:23:32,414 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)] === [2023-11-12 02:23:32,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 773, now seen corresponding path program 1 times [2023-11-12 02:23:32,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:32,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757835173] [2023-11-12 02:23:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:32,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757835173] [2023-11-12 02:23:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757835173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:32,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:32,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:23:32,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779724519] [2023-11-12 02:23:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:23:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:23:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:23:32,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2023-11-12 02:23:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 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) [2023-11-12 02:23:32,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:32,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2023-11-12 02:23:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:33,088 INFO L124 PetriNetUnfolderBase]: 1250/1969 cut-off events. [2023-11-12 02:23:33,089 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:23:33,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9056 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-11-12 02:23:33,114 INFO L140 encePairwiseOnDemand]: 379/381 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-11-12 02:23:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-11-12 02:23:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:23:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:23:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 388 transitions. [2023-11-12 02:23:33,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091863517060368 [2023-11-12 02:23:33,137 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 388 transitions. [2023-11-12 02:23:33,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 388 transitions. [2023-11-12 02:23:33,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:33,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 388 transitions. [2023-11-12 02:23:33,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 194.0) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,186 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,196 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 388 transitions. [2023-11-12 02:23:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-11-12 02:23:33,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:33,207 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-11-12 02:23:33,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-12 02:23:33,217 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-11-12 02:23:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-11-12 02:23:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 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) [2023-11-12 02:23:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:23:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:23:33,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 762573, now seen corresponding path program 1 times [2023-11-12 02:23:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:33,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309254131] [2023-11-12 02:23:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309254131] [2023-11-12 02:23:33,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309254131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:33,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:33,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:23:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493115690] [2023-11-12 02:23:33,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:33,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:33,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 381 [2023-11-12 02:23:33,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:33,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 381 [2023-11-12 02:23:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:33,935 INFO L124 PetriNetUnfolderBase]: 1223/1917 cut-off events. [2023-11-12 02:23:33,936 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:23:33,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8748 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-11-12 02:23:33,954 INFO L140 encePairwiseOnDemand]: 377/381 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-12 02:23:33,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-11-12 02:23:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-11-12 02:23:33,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47244094488188976 [2023-11-12 02:23:33,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-11-12 02:23:33,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-11-12 02:23:33,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:33,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-11-12 02:23:33,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,992 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 540 transitions. [2023-11-12 02:23:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-11-12 02:23:33,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:23:33,994 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-11-12 02:23:33,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-11-12 02:23:33,995 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-11-12 02:23:33,995 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-11-12 02:23:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:33,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:23:33,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:23:33,999 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)] === [2023-11-12 02:23:34,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash 762572, now seen corresponding path program 1 times [2023-11-12 02:23:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:34,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787104451] [2023-11-12 02:23:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787104451] [2023-11-12 02:23:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787104451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:34,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:34,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:23:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499989318] [2023-11-12 02:23:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:34,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 381 [2023-11-12 02:23:34,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:34,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 381 [2023-11-12 02:23:34,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:34,441 INFO L124 PetriNetUnfolderBase]: 1196/1865 cut-off events. [2023-11-12 02:23:34,441 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:23:34,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8450 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-11-12 02:23:34,459 INFO L140 encePairwiseOnDemand]: 377/381 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-12 02:23:34,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-11-12 02:23:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-11-12 02:23:34,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46019247594050744 [2023-11-12 02:23:34,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-11-12 02:23:34,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-11-12 02:23:34,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:34,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-11-12 02:23:34,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,472 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 526 transitions. [2023-11-12 02:23:34,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-11-12 02:23:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:34,475 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-11-12 02:23:34,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-12 02:23:34,476 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-11-12 02:23:34,476 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-11-12 02:23:34,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:34,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:23:34,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:23:34,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:34,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash 732848414, now seen corresponding path program 1 times [2023-11-12 02:23:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590848276] [2023-11-12 02:23:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:34,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590848276] [2023-11-12 02:23:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590848276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:34,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507761676] [2023-11-12 02:23:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:34,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 381 [2023-11-12 02:23:34,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:34,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 381 [2023-11-12 02:23:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:34,973 INFO L124 PetriNetUnfolderBase]: 875/1390 cut-off events. [2023-11-12 02:23:34,974 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:23:34,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6028 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-11-12 02:23:34,985 INFO L140 encePairwiseOnDemand]: 378/381 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-12 02:23:34,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-11-12 02:23:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-12 02:23:34,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479440069991251 [2023-11-12 02:23:34,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-12 02:23:34,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-12 02:23:34,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:34,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-12 02:23:34,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,997 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 512 transitions. [2023-11-12 02:23:34,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-11-12 02:23:34,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:35,000 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-11-12 02:23:35,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-12 02:23:35,003 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-11-12 02:23:35,003 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-11-12 02:23:35,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:35,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:23:35,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:23:35,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:35,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash 732848412, now seen corresponding path program 1 times [2023-11-12 02:23:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769336096] [2023-11-12 02:23:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:35,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769336096] [2023-11-12 02:23:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769336096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:35,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798077964] [2023-11-12 02:23:35,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:35,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:35,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:35,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 381 [2023-11-12 02:23:35,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:35,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 381 [2023-11-12 02:23:35,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:35,400 INFO L124 PetriNetUnfolderBase]: 554/915 cut-off events. [2023-11-12 02:23:35,400 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:23:35,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3803 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-11-12 02:23:35,408 INFO L140 encePairwiseOnDemand]: 378/381 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-12 02:23:35,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-11-12 02:23:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-11-12 02:23:35,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46281714785651795 [2023-11-12 02:23:35,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-11-12 02:23:35,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-11-12 02:23:35,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:35,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-11-12 02:23:35,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,420 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 529 transitions. [2023-11-12 02:23:35,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-11-12 02:23:35,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:35,422 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-11-12 02:23:35,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-12 02:23:35,423 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-11-12 02:23:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-11-12 02:23:35,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:35,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:23:35,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:23:35,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:35,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1243837933, now seen corresponding path program 1 times [2023-11-12 02:23:35,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:35,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643853277] [2023-11-12 02:23:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:35,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:35,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643853277] [2023-11-12 02:23:35,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643853277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:35,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:35,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299282039] [2023-11-12 02:23:35,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:35,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 381 [2023-11-12 02:23:35,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:35,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 381 [2023-11-12 02:23:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:35,735 INFO L124 PetriNetUnfolderBase]: 725/1228 cut-off events. [2023-11-12 02:23:35,736 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-12 02:23:35,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 1228 events. 725/1228 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5035 event pairs, 327 based on Foata normal form. 24/898 useless extension candidates. Maximal degree in co-relation 2441. Up to 809 conditions per place. [2023-11-12 02:23:35,746 INFO L140 encePairwiseOnDemand]: 376/381 looper letters, 56 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-12 02:23:35,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 253 flow [2023-11-12 02:23:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-11-12 02:23:35,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864391951006124 [2023-11-12 02:23:35,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-11-12 02:23:35,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-11-12 02:23:35,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:35,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-11-12 02:23:35,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,757 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 3 states and 556 transitions. [2023-11-12 02:23:35,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 253 flow [2023-11-12 02:23:35,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:35,760 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 97 flow [2023-11-12 02:23:35,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-12 02:23:35,761 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-11-12 02:23:35,762 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 97 flow [2023-11-12 02:23:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:35,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:23:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:23:35,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:35,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1243835374, now seen corresponding path program 1 times [2023-11-12 02:23:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:35,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308971380] [2023-11-12 02:23:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308971380] [2023-11-12 02:23:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308971380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:35,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:35,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475558574] [2023-11-12 02:23:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:36,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 381 [2023-11-12 02:23:36,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 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) [2023-11-12 02:23:36,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:36,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 381 [2023-11-12 02:23:36,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:36,397 INFO L124 PetriNetUnfolderBase]: 660/1137 cut-off events. [2023-11-12 02:23:36,397 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-12 02:23:36,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1137 events. 660/1137 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4932 event pairs, 231 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 2363. Up to 546 conditions per place. [2023-11-12 02:23:36,407 INFO L140 encePairwiseOnDemand]: 374/381 looper letters, 65 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2023-11-12 02:23:36,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 74 transitions, 323 flow [2023-11-12 02:23:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:23:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-11-12 02:23:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462992125984252 [2023-11-12 02:23:36,412 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-11-12 02:23:36,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-11-12 02:23:36,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:36,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-11-12 02:23:36,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:36,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:36,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:36,422 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 97 flow. Second operand 5 states and 882 transitions. [2023-11-12 02:23:36,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 74 transitions, 323 flow [2023-11-12 02:23:36,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 74 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:36,427 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 106 flow [2023-11-12 02:23:36,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-11-12 02:23:36,428 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-11-12 02:23:36,428 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 106 flow [2023-11-12 02:23:36,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 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) [2023-11-12 02:23:36,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:36,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:23:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:23:36,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:36,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1243835375, now seen corresponding path program 1 times [2023-11-12 02:23:36,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:36,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533891052] [2023-11-12 02:23:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533891052] [2023-11-12 02:23:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533891052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:36,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966711779] [2023-11-12 02:23:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:36,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:36,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:37,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 381 [2023-11-12 02:23:37,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:37,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 381 [2023-11-12 02:23:37,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:37,353 INFO L124 PetriNetUnfolderBase]: 715/1226 cut-off events. [2023-11-12 02:23:37,353 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-11-12 02:23:37,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 1226 events. 715/1226 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5236 event pairs, 285 based on Foata normal form. 0/1014 useless extension candidates. Maximal degree in co-relation 2714. Up to 1001 conditions per place. [2023-11-12 02:23:37,364 INFO L140 encePairwiseOnDemand]: 376/381 looper letters, 63 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-12 02:23:37,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 317 flow [2023-11-12 02:23:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:23:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 872 transitions. [2023-11-12 02:23:37,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45774278215223096 [2023-11-12 02:23:37,368 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 872 transitions. [2023-11-12 02:23:37,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 872 transitions. [2023-11-12 02:23:37,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:37,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 872 transitions. [2023-11-12 02:23:37,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.4) internal successors, (872), 5 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,377 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,378 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 106 flow. Second operand 5 states and 872 transitions. [2023-11-12 02:23:37,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 317 flow [2023-11-12 02:23:37,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:37,382 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-11-12 02:23:37,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-12 02:23:37,383 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-11-12 02:23:37,383 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-11-12 02:23:37,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:37,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:37,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:23:37,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:37,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1848676250, now seen corresponding path program 1 times [2023-11-12 02:23:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:37,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663587669] [2023-11-12 02:23:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:37,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663587669] [2023-11-12 02:23:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663587669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:37,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619794875] [2023-11-12 02:23:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:37,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:37,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 381 [2023-11-12 02:23:37,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:37,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 381 [2023-11-12 02:23:37,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:37,680 INFO L124 PetriNetUnfolderBase]: 775/1344 cut-off events. [2023-11-12 02:23:37,681 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-12 02:23:37,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1344 events. 775/1344 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6435 event pairs, 359 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2944. Up to 1169 conditions per place. [2023-11-12 02:23:37,693 INFO L140 encePairwiseOnDemand]: 378/381 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-12 02:23:37,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 281 flow [2023-11-12 02:23:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-12 02:23:37,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890638670166229 [2023-11-12 02:23:37,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-12 02:23:37,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-12 02:23:37,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:37,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-12 02:23:37,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,703 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 559 transitions. [2023-11-12 02:23:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 281 flow [2023-11-12 02:23:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:37,707 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 138 flow [2023-11-12 02:23:37,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-12 02:23:37,708 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-11-12 02:23:37,708 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 138 flow [2023-11-12 02:23:37,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:37,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:23:37,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:37,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 104517132, now seen corresponding path program 1 times [2023-11-12 02:23:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:37,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883871604] [2023-11-12 02:23:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:37,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883871604] [2023-11-12 02:23:37,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883871604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:37,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:37,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497206844] [2023-11-12 02:23:37,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:37,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:37,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:37,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:37,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 381 [2023-11-12 02:23:37,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:37,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 381 [2023-11-12 02:23:37,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:38,023 INFO L124 PetriNetUnfolderBase]: 813/1394 cut-off events. [2023-11-12 02:23:38,024 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2023-11-12 02:23:38,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3329 conditions, 1394 events. 813/1394 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6664 event pairs, 307 based on Foata normal form. 10/1210 useless extension candidates. Maximal degree in co-relation 3320. Up to 1143 conditions per place. [2023-11-12 02:23:38,036 INFO L140 encePairwiseOnDemand]: 378/381 looper letters, 59 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-12 02:23:38,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 310 flow [2023-11-12 02:23:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-11-12 02:23:38,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343832020997375 [2023-11-12 02:23:38,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-11-12 02:23:38,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-11-12 02:23:38,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:38,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-11-12 02:23:38,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:38,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:38,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:38,047 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 138 flow. Second operand 3 states and 564 transitions. [2023-11-12 02:23:38,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 310 flow [2023-11-12 02:23:38,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:38,051 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 148 flow [2023-11-12 02:23:38,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-12 02:23:38,052 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-11-12 02:23:38,052 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 148 flow [2023-11-12 02:23:38,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:38,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:38,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:38,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:23:38,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:38,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -449659934, now seen corresponding path program 1 times [2023-11-12 02:23:38,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617977093] [2023-11-12 02:23:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:38,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617977093] [2023-11-12 02:23:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617977093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728962665] [2023-11-12 02:23:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:38,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:38,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:38,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:23:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:38,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:23:38,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:38,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:23:38,792 INFO L351 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 [2023-11-12 02:23:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:23:38,816 INFO L322 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-12 02:23:38,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 1 [2023-11-12 02:23:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:39,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728962665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:39,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:39,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-11-12 02:23:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053058693] [2023-11-12 02:23:39,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:39,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:23:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:23:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:23:41,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 381 [2023-11-12 02:23:41,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 148 flow. Second operand has 21 states, 21 states have (on average 152.85714285714286) internal successors, (3210), 21 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:41,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:41,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 381 [2023-11-12 02:23:41,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:43,496 INFO L124 PetriNetUnfolderBase]: 2000/3293 cut-off events. [2023-11-12 02:23:43,497 INFO L125 PetriNetUnfolderBase]: For 1033/1033 co-relation queries the response was YES. [2023-11-12 02:23:43,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 3293 events. 2000/3293 cut-off events. For 1033/1033 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16690 event pairs, 227 based on Foata normal form. 114/2991 useless extension candidates. Maximal degree in co-relation 8067. Up to 1486 conditions per place. [2023-11-12 02:23:43,597 INFO L140 encePairwiseOnDemand]: 371/381 looper letters, 202 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2023-11-12 02:23:43,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 225 transitions, 1052 flow [2023-11-12 02:23:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:23:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:23:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2344 transitions. [2023-11-12 02:23:43,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394450693663292 [2023-11-12 02:23:43,636 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2344 transitions. [2023-11-12 02:23:43,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2344 transitions. [2023-11-12 02:23:43,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:43,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2344 transitions. [2023-11-12 02:23:43,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.42857142857142) internal successors, (2344), 14 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:43,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:43,663 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:43,663 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 148 flow. Second operand 14 states and 2344 transitions. [2023-11-12 02:23:43,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 225 transitions, 1052 flow [2023-11-12 02:23:43,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 225 transitions, 1049 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:43,675 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 328 flow [2023-11-12 02:23:43,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-11-12 02:23:43,677 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 20 predicate places. [2023-11-12 02:23:43,677 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 328 flow [2023-11-12 02:23:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 152.85714285714286) internal successors, (3210), 21 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:43,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:43,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:23:43,888 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:43,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash -238027168, now seen corresponding path program 1 times [2023-11-12 02:23:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142558879] [2023-11-12 02:23:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142558879] [2023-11-12 02:23:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142558879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:43,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313725163] [2023-11-12 02:23:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:44,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 381 [2023-11-12 02:23:44,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 328 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:44,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 381 [2023-11-12 02:23:44,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:44,253 INFO L124 PetriNetUnfolderBase]: 579/1140 cut-off events. [2023-11-12 02:23:44,254 INFO L125 PetriNetUnfolderBase]: For 1113/1113 co-relation queries the response was YES. [2023-11-12 02:23:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1140 events. 579/1140 cut-off events. For 1113/1113 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5343 event pairs, 97 based on Foata normal form. 50/1110 useless extension candidates. Maximal degree in co-relation 3156. Up to 804 conditions per place. [2023-11-12 02:23:44,264 INFO L140 encePairwiseOnDemand]: 376/381 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2023-11-12 02:23:44,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 425 flow [2023-11-12 02:23:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-11-12 02:23:44,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4759405074365704 [2023-11-12 02:23:44,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-11-12 02:23:44,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-11-12 02:23:44,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:44,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-11-12 02:23:44,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 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) [2023-11-12 02:23:44,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,275 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 328 flow. Second operand 3 states and 544 transitions. [2023-11-12 02:23:44,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 425 flow [2023-11-12 02:23:44,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 385 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-11-12 02:23:44,290 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 261 flow [2023-11-12 02:23:44,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-11-12 02:23:44,293 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-11-12 02:23:44,293 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 261 flow [2023-11-12 02:23:44,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:44,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:23:44,295 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:44,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1015925494, now seen corresponding path program 1 times [2023-11-12 02:23:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:44,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397672072] [2023-11-12 02:23:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:44,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397672072] [2023-11-12 02:23:44,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397672072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:44,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:44,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:23:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73616203] [2023-11-12 02:23:44,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:44,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:23:44,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:23:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:44,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 381 [2023-11-12 02:23:44,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:44,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 381 [2023-11-12 02:23:44,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:45,243 INFO L124 PetriNetUnfolderBase]: 573/1121 cut-off events. [2023-11-12 02:23:45,243 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-12 02:23:45,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 1121 events. 573/1121 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5171 event pairs, 208 based on Foata normal form. 0/1115 useless extension candidates. Maximal degree in co-relation 3039. Up to 502 conditions per place. [2023-11-12 02:23:45,252 INFO L140 encePairwiseOnDemand]: 369/381 looper letters, 45 selfloop transitions, 23 changer transitions 0/72 dead transitions. [2023-11-12 02:23:45,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 439 flow [2023-11-12 02:23:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:23:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:23:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1145 transitions. [2023-11-12 02:23:45,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293213348331459 [2023-11-12 02:23:45,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1145 transitions. [2023-11-12 02:23:45,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1145 transitions. [2023-11-12 02:23:45,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:45,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1145 transitions. [2023-11-12 02:23:45,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:45,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:45,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:45,272 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 261 flow. Second operand 7 states and 1145 transitions. [2023-11-12 02:23:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 439 flow [2023-11-12 02:23:45,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:45,280 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 295 flow [2023-11-12 02:23:45,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-11-12 02:23:45,282 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-11-12 02:23:45,282 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 295 flow [2023-11-12 02:23:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:45,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:45,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:45,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:23:45,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:45,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -418177423, now seen corresponding path program 1 times [2023-11-12 02:23:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:45,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516880341] [2023-11-12 02:23:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:45,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516880341] [2023-11-12 02:23:45,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516880341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:45,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:45,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 02:23:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166313688] [2023-11-12 02:23:45,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:23:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:23:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:23:47,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 381 [2023-11-12 02:23:47,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 295 flow. Second operand has 13 states, 13 states have (on average 141.46153846153845) internal successors, (1839), 13 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:47,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 381 [2023-11-12 02:23:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:47,843 INFO L124 PetriNetUnfolderBase]: 657/1224 cut-off events. [2023-11-12 02:23:47,844 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2023-11-12 02:23:47,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1224 events. 657/1224 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5406 event pairs, 117 based on Foata normal form. 0/1184 useless extension candidates. Maximal degree in co-relation 3483. Up to 872 conditions per place. [2023-11-12 02:23:47,853 INFO L140 encePairwiseOnDemand]: 369/381 looper letters, 106 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-11-12 02:23:47,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 696 flow [2023-11-12 02:23:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:23:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:23:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1791 transitions. [2023-11-12 02:23:47,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39173228346456695 [2023-11-12 02:23:47,861 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1791 transitions. [2023-11-12 02:23:47,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1791 transitions. [2023-11-12 02:23:47,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:47,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1791 transitions. [2023-11-12 02:23:47,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 149.25) internal successors, (1791), 12 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,878 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,878 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 295 flow. Second operand 12 states and 1791 transitions. [2023-11-12 02:23:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 696 flow [2023-11-12 02:23:47,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 661 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-12 02:23:47,931 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 326 flow [2023-11-12 02:23:47,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=326, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-11-12 02:23:47,932 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2023-11-12 02:23:47,933 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 326 flow [2023-11-12 02:23:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.46153846153845) internal successors, (1839), 13 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:47,934 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] [2023-11-12 02:23:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:23:47,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:47,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1179166297, now seen corresponding path program 1 times [2023-11-12 02:23:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133324478] [2023-11-12 02:23:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133324478] [2023-11-12 02:23:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133324478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:48,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:48,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918752887] [2023-11-12 02:23:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:48,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 381 [2023-11-12 02:23:48,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:48,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 381 [2023-11-12 02:23:48,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:48,323 INFO L124 PetriNetUnfolderBase]: 809/1590 cut-off events. [2023-11-12 02:23:48,324 INFO L125 PetriNetUnfolderBase]: For 1252/1252 co-relation queries the response was YES. [2023-11-12 02:23:48,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4638 conditions, 1590 events. 809/1590 cut-off events. For 1252/1252 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8218 event pairs, 449 based on Foata normal form. 70/1604 useless extension candidates. Maximal degree in co-relation 4617. Up to 1049 conditions per place. [2023-11-12 02:23:48,337 INFO L140 encePairwiseOnDemand]: 377/381 looper letters, 97 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-11-12 02:23:48,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 782 flow [2023-11-12 02:23:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-11-12 02:23:48,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49431321084864394 [2023-11-12 02:23:48,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-11-12 02:23:48,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-11-12 02:23:48,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:48,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-11-12 02:23:48,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,345 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 326 flow. Second operand 3 states and 565 transitions. [2023-11-12 02:23:48,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 782 flow [2023-11-12 02:23:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 760 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-12 02:23:48,356 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 335 flow [2023-11-12 02:23:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=335, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-11-12 02:23:48,358 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 28 predicate places. [2023-11-12 02:23:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 335 flow [2023-11-12 02:23:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 02:23:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:23:48,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1562759539, now seen corresponding path program 1 times [2023-11-12 02:23:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038984067] [2023-11-12 02:23:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:48,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:48,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038984067] [2023-11-12 02:23:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038984067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823248721] [2023-11-12 02:23:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:48,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:48,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:48,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:23:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:48,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:23:48,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:48,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:48,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823248721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:48,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:48,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-12 02:23:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978537476] [2023-11-12 02:23:48,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:23:48,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:23:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:23:48,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 381 [2023-11-12 02:23:48,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 335 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:48,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 381 [2023-11-12 02:23:48,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:49,756 INFO L124 PetriNetUnfolderBase]: 1475/2770 cut-off events. [2023-11-12 02:23:49,756 INFO L125 PetriNetUnfolderBase]: For 2172/2172 co-relation queries the response was YES. [2023-11-12 02:23:49,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8356 conditions, 2770 events. 1475/2770 cut-off events. For 2172/2172 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 13837 event pairs, 375 based on Foata normal form. 58/2818 useless extension candidates. Maximal degree in co-relation 8334. Up to 591 conditions per place. [2023-11-12 02:23:49,784 INFO L140 encePairwiseOnDemand]: 373/381 looper letters, 191 selfloop transitions, 35 changer transitions 0/226 dead transitions. [2023-11-12 02:23:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 226 transitions, 1483 flow [2023-11-12 02:23:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:23:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:23:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2282 transitions. [2023-11-12 02:23:49,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46073087017968906 [2023-11-12 02:23:49,795 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2282 transitions. [2023-11-12 02:23:49,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2282 transitions. [2023-11-12 02:23:49,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:49,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2282 transitions. [2023-11-12 02:23:49,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.53846153846155) internal successors, (2282), 13 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 381.0) internal successors, (5334), 14 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,816 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 381.0) internal successors, (5334), 14 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,817 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 335 flow. Second operand 13 states and 2282 transitions. [2023-11-12 02:23:49,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 226 transitions, 1483 flow [2023-11-12 02:23:49,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 226 transitions, 1469 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:49,829 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 608 flow [2023-11-12 02:23:49,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=608, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2023-11-12 02:23:49,830 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2023-11-12 02:23:49,830 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 608 flow [2023-11-12 02:23:49,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:49,832 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] [2023-11-12 02:23:49,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:23:50,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:23:50,038 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:50,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash 215573502, now seen corresponding path program 1 times [2023-11-12 02:23:50,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:50,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942712009] [2023-11-12 02:23:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:50,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942712009] [2023-11-12 02:23:50,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942712009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:50,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:50,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-12 02:23:50,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304544292] [2023-11-12 02:23:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:50,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:23:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:23:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:23:52,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 381 [2023-11-12 02:23:52,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 608 flow. Second operand has 15 states, 15 states have (on average 134.4) internal successors, (2016), 15 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 381 [2023-11-12 02:23:52,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:54,253 INFO L124 PetriNetUnfolderBase]: 1513/2894 cut-off events. [2023-11-12 02:23:54,253 INFO L125 PetriNetUnfolderBase]: For 3026/3026 co-relation queries the response was YES. [2023-11-12 02:23:54,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9391 conditions, 2894 events. 1513/2894 cut-off events. For 3026/3026 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 14789 event pairs, 362 based on Foata normal form. 12/2893 useless extension candidates. Maximal degree in co-relation 9364. Up to 2356 conditions per place. [2023-11-12 02:23:54,281 INFO L140 encePairwiseOnDemand]: 365/381 looper letters, 141 selfloop transitions, 26 changer transitions 0/174 dead transitions. [2023-11-12 02:23:54,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 1265 flow [2023-11-12 02:23:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:23:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:23:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2521 transitions. [2023-11-12 02:23:54,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3675998833479148 [2023-11-12 02:23:54,292 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2521 transitions. [2023-11-12 02:23:54,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2521 transitions. [2023-11-12 02:23:54,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:54,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2521 transitions. [2023-11-12 02:23:54,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.05555555555554) internal successors, (2521), 18 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:54,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 381.0) internal successors, (7239), 19 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:54,317 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 381.0) internal successors, (7239), 19 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:54,318 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 608 flow. Second operand 18 states and 2521 transitions. [2023-11-12 02:23:54,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 1265 flow [2023-11-12 02:23:54,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1203 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:54,337 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 756 flow [2023-11-12 02:23:54,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=756, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2023-11-12 02:23:54,338 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 68 predicate places. [2023-11-12 02:23:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 756 flow [2023-11-12 02:23:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.4) internal successors, (2016), 15 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:54,339 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] [2023-11-12 02:23:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:23:54,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:54,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1140437164, now seen corresponding path program 2 times [2023-11-12 02:23:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743712064] [2023-11-12 02:23:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:55,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:55,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743712064] [2023-11-12 02:23:55,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743712064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:55,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-12 02:23:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682507828] [2023-11-12 02:23:55,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:23:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:23:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:23:57,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 381 [2023-11-12 02:23:57,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 756 flow. Second operand has 16 states, 16 states have (on average 130.3125) internal successors, (2085), 16 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:57,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 381 [2023-11-12 02:23:57,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:58,848 INFO L124 PetriNetUnfolderBase]: 1593/3050 cut-off events. [2023-11-12 02:23:58,848 INFO L125 PetriNetUnfolderBase]: For 3121/3121 co-relation queries the response was YES. [2023-11-12 02:23:58,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 3050 events. 1593/3050 cut-off events. For 3121/3121 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15779 event pairs, 382 based on Foata normal form. 6/3043 useless extension candidates. Maximal degree in co-relation 10184. Up to 2362 conditions per place. [2023-11-12 02:23:58,884 INFO L140 encePairwiseOnDemand]: 365/381 looper letters, 141 selfloop transitions, 29 changer transitions 0/177 dead transitions. [2023-11-12 02:23:58,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 177 transitions, 1361 flow [2023-11-12 02:23:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:23:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:23:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1922 transitions. [2023-11-12 02:23:58,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603299587551556 [2023-11-12 02:23:58,891 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1922 transitions. [2023-11-12 02:23:58,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1922 transitions. [2023-11-12 02:23:58,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:58,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1922 transitions. [2023-11-12 02:23:58,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.28571428571428) internal successors, (1922), 14 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,907 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,907 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 756 flow. Second operand 14 states and 1922 transitions. [2023-11-12 02:23:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 177 transitions, 1361 flow [2023-11-12 02:23:58,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 1350 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:23:58,931 INFO L231 Difference]: Finished difference. Result has 133 places, 115 transitions, 914 flow [2023-11-12 02:23:58,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=914, PETRI_PLACES=133, PETRI_TRANSITIONS=115} [2023-11-12 02:23:58,932 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2023-11-12 02:23:58,932 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 115 transitions, 914 flow [2023-11-12 02:23:58,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 130.3125) internal successors, (2085), 16 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:58,934 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] [2023-11-12 02:23:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:23:58,934 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:23:58,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 567798546, now seen corresponding path program 3 times [2023-11-12 02:23:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:58,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410847845] [2023-11-12 02:23:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:58,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410847845] [2023-11-12 02:23:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410847845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:59,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:23:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303153071] [2023-11-12 02:23:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:59,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:23:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:23:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:24:00,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 381 [2023-11-12 02:24:00,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 115 transitions, 914 flow. Second operand has 11 states, 11 states have (on average 147.8181818181818) internal successors, (1626), 11 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:00,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:00,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 381 [2023-11-12 02:24:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:01,527 INFO L124 PetriNetUnfolderBase]: 1700/3340 cut-off events. [2023-11-12 02:24:01,528 INFO L125 PetriNetUnfolderBase]: For 4678/4678 co-relation queries the response was YES. [2023-11-12 02:24:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11587 conditions, 3340 events. 1700/3340 cut-off events. For 4678/4678 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 18409 event pairs, 545 based on Foata normal form. 12/3333 useless extension candidates. Maximal degree in co-relation 11543. Up to 2063 conditions per place. [2023-11-12 02:24:01,575 INFO L140 encePairwiseOnDemand]: 371/381 looper letters, 128 selfloop transitions, 30 changer transitions 0/175 dead transitions. [2023-11-12 02:24:01,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 175 transitions, 1496 flow [2023-11-12 02:24:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:24:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:24:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1560 transitions. [2023-11-12 02:24:01,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094488188976378 [2023-11-12 02:24:01,580 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1560 transitions. [2023-11-12 02:24:01,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1560 transitions. [2023-11-12 02:24:01,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:01,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1560 transitions. [2023-11-12 02:24:01,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:01,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 381.0) internal successors, (4191), 11 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:01,592 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 381.0) internal successors, (4191), 11 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:01,592 INFO L175 Difference]: Start difference. First operand has 133 places, 115 transitions, 914 flow. Second operand 10 states and 1560 transitions. [2023-11-12 02:24:01,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 175 transitions, 1496 flow [2023-11-12 02:24:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 1448 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-12 02:24:01,626 INFO L231 Difference]: Finished difference. Result has 140 places, 125 transitions, 1059 flow [2023-11-12 02:24:01,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1059, PETRI_PLACES=140, PETRI_TRANSITIONS=125} [2023-11-12 02:24:01,628 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 92 predicate places. [2023-11-12 02:24:01,628 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 125 transitions, 1059 flow [2023-11-12 02:24:01,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 147.8181818181818) internal successors, (1626), 11 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:01,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:01,629 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] [2023-11-12 02:24:01,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 02:24:01,630 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:24:01,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 915400980, now seen corresponding path program 1 times [2023-11-12 02:24:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:01,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245891750] [2023-11-12 02:24:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:01,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245891750] [2023-11-12 02:24:01,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245891750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624802341] [2023-11-12 02:24:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:01,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:01,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:01,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:01,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f63c672-6155-439f-9afe-ddbb47536b0f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:24:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:01,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:24:01,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:01,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624802341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:01,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:01,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 02:24:01,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774927874] [2023-11-12 02:24:01,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:01,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:24:01,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:01,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:24:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:24:01,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 381 [2023-11-12 02:24:01,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 125 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:01,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:01,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 381 [2023-11-12 02:24:01,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand