./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:01,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:02,003 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:16:02,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:02,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:02,046 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:02,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:02,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:02,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:02,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:02,056 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:02,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:02,057 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:02,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:02,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:16:02,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:02,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:16:02,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:02,062 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:16:02,062 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:16:02,063 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:16:02,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:02,064 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:16:02,064 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:16:02,065 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:16:02,065 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:02,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:02,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:02,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:02,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:02,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:02,070 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:02,070 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:02,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:02,071 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:02,071 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:02,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:02,071 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:02,072 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_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2023-11-06 22:16:02,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:02,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:02,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:02,374 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:02,375 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:02,376 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-06 22:16:05,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:05,872 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:05,873 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-06 22:16:05,901 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/data/4f501468a/38c7063f565b47588fe99c5ec17a9fc9/FLAGf2dd644b2 [2023-11-06 22:16:05,918 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/data/4f501468a/38c7063f565b47588fe99c5ec17a9fc9 [2023-11-06 22:16:05,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:05,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:05,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:05,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:05,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:05,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:05" (1/1) ... [2023-11-06 22:16:05,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed0ddb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:05, skipping insertion in model container [2023-11-06 22:16:05,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:05" (1/1) ... [2023-11-06 22:16:05,984 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:06,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:06,463 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:06,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:06,563 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:06,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06 WrapperNode [2023-11-06 22:16:06,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:06,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:06,566 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:06,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:06,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,593 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,622 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-11-06 22:16:06,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:06,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:06,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:06,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:06,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:06,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:06,668 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:06,668 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:06,669 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (1/1) ... [2023-11-06 22:16:06,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:06,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:06,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:06,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:06,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:16:06,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:16:06,776 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:16:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:16:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:16:06,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:16:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:16:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:06,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:06,781 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:16:07,006 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:07,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:07,359 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:07,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:07,370 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 22:16:07,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:07 BoogieIcfgContainer [2023-11-06 22:16:07,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:07,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:07,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:07,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:07,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:05" (1/3) ... [2023-11-06 22:16:07,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3e2867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:07, skipping insertion in model container [2023-11-06 22:16:07,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:06" (2/3) ... [2023-11-06 22:16:07,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3e2867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:07, skipping insertion in model container [2023-11-06 22:16:07,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:07" (3/3) ... [2023-11-06 22:16:07,384 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-11-06 22:16:07,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:07,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 22:16:07,409 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:16:07,528 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:16:07,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,681 INFO L124 PetriNetUnfolderBase]: 19/199 cut-off events. [2023-11-06 22:16:07,681 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:16:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 199 events. 19/199 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 625 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 100. Up to 4 conditions per place. [2023-11-06 22:16:07,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:16:07,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 145 transitions, 297 flow [2023-11-06 22:16:07,780 INFO L124 PetriNetUnfolderBase]: 19/199 cut-off events. [2023-11-06 22:16:07,780 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:16:07,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 199 events. 19/199 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 625 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 100. Up to 4 conditions per place. [2023-11-06 22:16:07,797 INFO L119 LiptonReduction]: Number of co-enabled transitions 4920 [2023-11-06 22:16:12,871 INFO L134 LiptonReduction]: Checked pairs total: 10440 [2023-11-06 22:16:12,871 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-06 22:16:12,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:12,899 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;@2c3e6861, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:12,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-06 22:16:12,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:16:12,903 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:16:12,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:16:12,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:12,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:12,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 22:16:12,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash 17659, now seen corresponding path program 1 times [2023-11-06 22:16:12,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:12,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656030458] [2023-11-06 22:16:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:13,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656030458] [2023-11-06 22:16:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656030458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640644493] [2023-11-06 22:16:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:13,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:13,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 280 [2023-11-06 22:16:13,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:13,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 280 [2023-11-06 22:16:13,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:13,778 INFO L124 PetriNetUnfolderBase]: 204/466 cut-off events. [2023-11-06 22:16:13,778 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:16:13,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 466 events. 204/466 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2583 event pairs, 0 based on Foata normal form. 18/309 useless extension candidates. Maximal degree in co-relation 879. Up to 433 conditions per place. [2023-11-06 22:16:13,786 INFO L140 encePairwiseOnDemand]: 265/280 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-06 22:16:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 207 flow [2023-11-06 22:16:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:16:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-11-06 22:16:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202380952380953 [2023-11-06 22:16:13,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-11-06 22:16:13,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-11-06 22:16:13,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:13,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-11-06 22:16:13,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,835 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 107 flow. Second operand 3 states and 437 transitions. [2023-11-06 22:16:13,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 207 flow [2023-11-06 22:16:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:16:13,843 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 95 flow [2023-11-06 22:16:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=95, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-06 22:16:13,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-06 22:16:13,851 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 95 flow [2023-11-06 22:16:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:13,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:16:13,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 22:16:13,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash 17660, now seen corresponding path program 1 times [2023-11-06 22:16:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:13,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113892148] [2023-11-06 22:16:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:13,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113892148] [2023-11-06 22:16:13,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113892148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:13,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:13,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:13,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88928582] [2023-11-06 22:16:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:13,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:13,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:14,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 280 [2023-11-06 22:16:14,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:14,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 280 [2023-11-06 22:16:14,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:14,192 INFO L124 PetriNetUnfolderBase]: 180/430 cut-off events. [2023-11-06 22:16:14,192 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-06 22:16:14,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 430 events. 180/430 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2175 event pairs, 156 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 855. Up to 344 conditions per place. [2023-11-06 22:16:14,198 INFO L140 encePairwiseOnDemand]: 275/280 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-11-06 22:16:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 201 flow [2023-11-06 22:16:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:16:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-06 22:16:14,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-06 22:16:14,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-06 22:16:14,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-06 22:16:14,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:14,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-06 22:16:14,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,211 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 95 flow. Second operand 3 states and 408 transitions. [2023-11-06 22:16:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 201 flow [2023-11-06 22:16:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:14,214 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 93 flow [2023-11-06 22:16:14,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-06 22:16:14,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-06 22:16:14,216 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 93 flow [2023-11-06 22:16:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:14,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:16:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:16:14,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 22:16:14,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 526527766, now seen corresponding path program 1 times [2023-11-06 22:16:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939764713] [2023-11-06 22:16:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:14,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939764713] [2023-11-06 22:16:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939764713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231754731] [2023-11-06 22:16:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:14,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:14,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:16:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:14,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:14,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:14,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:16:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:14,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:14,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231754731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:14,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:14,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:16:14,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820217211] [2023-11-06 22:16:14,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:14,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:14,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 280 [2023-11-06 22:16:15,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:15,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 280 [2023-11-06 22:16:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:15,283 INFO L124 PetriNetUnfolderBase]: 24/79 cut-off events. [2023-11-06 22:16:15,283 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:16:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 79 events. 24/79 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 206 event pairs, 11 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 157. Up to 50 conditions per place. [2023-11-06 22:16:15,285 INFO L140 encePairwiseOnDemand]: 276/280 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-06 22:16:15,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 136 flow [2023-11-06 22:16:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:16:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-11-06 22:16:15,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45267857142857143 [2023-11-06 22:16:15,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-11-06 22:16:15,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-11-06 22:16:15,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:15,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-11-06 22:16:15,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,297 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 93 flow. Second operand 4 states and 507 transitions. [2023-11-06 22:16:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 136 flow [2023-11-06 22:16:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:15,299 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 53 flow [2023-11-06 22:16:15,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-06 22:16:15,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -14 predicate places. [2023-11-06 22:16:15,301 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 53 flow [2023-11-06 22:16:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:15,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:16:15,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:15,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 22:16:15,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash -857542876, now seen corresponding path program 1 times [2023-11-06 22:16:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587344204] [2023-11-06 22:16:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:15,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587344204] [2023-11-06 22:16:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587344204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:15,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060433944] [2023-11-06 22:16:15,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 280 [2023-11-06 22:16:16,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:16,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 280 [2023-11-06 22:16:16,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:16,210 INFO L124 PetriNetUnfolderBase]: 20/71 cut-off events. [2023-11-06 22:16:16,210 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:16:16,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 71 events. 20/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 137. Up to 50 conditions per place. [2023-11-06 22:16:16,212 INFO L140 encePairwiseOnDemand]: 276/280 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-11-06 22:16:16,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 22 transitions, 87 flow [2023-11-06 22:16:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:16:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-11-06 22:16:16,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446428571428571 [2023-11-06 22:16:16,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-11-06 22:16:16,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-11-06 22:16:16,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:16,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-11-06 22:16:16,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,230 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 53 flow. Second operand 4 states and 498 transitions. [2023-11-06 22:16:16,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 22 transitions, 87 flow [2023-11-06 22:16:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 83 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:16,232 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 50 flow [2023-11-06 22:16:16,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-06 22:16:16,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2023-11-06 22:16:16,234 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 50 flow [2023-11-06 22:16:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:16,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:16:16,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:16:16,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-06 22:16:16,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash -857507989, now seen corresponding path program 1 times [2023-11-06 22:16:16,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:16,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601908450] [2023-11-06 22:16:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:16:16,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:16:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:16:16,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:16:16,307 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:16:16,309 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-11-06 22:16:16,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-11-06 22:16:16,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-11-06 22:16:16,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-11-06 22:16:16,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-11-06 22:16:16,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-11-06 22:16:16,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-11-06 22:16:16,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2023-11-06 22:16:16,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2023-11-06 22:16:16,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-11-06 22:16:16,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-11-06 22:16:16,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-11-06 22:16:16,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-11-06 22:16:16,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-11-06 22:16:16,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-11-06 22:16:16,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-11-06 22:16:16,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-11-06 22:16:16,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2023-11-06 22:16:16,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-11-06 22:16:16,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-11-06 22:16:16,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-11-06 22:16:16,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-11-06 22:16:16,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-11-06 22:16:16,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-11-06 22:16:16,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-11-06 22:16:16,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:16:16,330 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-06 22:16:16,333 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:16:16,333 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:16:16,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:16:16,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,441 INFO L124 PetriNetUnfolderBase]: 34/327 cut-off events. [2023-11-06 22:16:16,441 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:16:16,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 327 events. 34/327 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1234 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-11-06 22:16:16,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:16:16,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 392 flow [2023-11-06 22:16:16,495 INFO L124 PetriNetUnfolderBase]: 34/327 cut-off events. [2023-11-06 22:16:16,495 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:16:16,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 327 events. 34/327 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1234 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-11-06 22:16:16,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 14104 [2023-11-06 22:16:21,644 INFO L134 LiptonReduction]: Checked pairs total: 33453 [2023-11-06 22:16:21,645 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-11-06 22:16:21,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:21,648 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;@2c3e6861, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:21,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-11-06 22:16:21,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:16:21,651 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-06 22:16:21,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:16:21,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:21,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:21,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:21,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 30389, now seen corresponding path program 1 times [2023-11-06 22:16:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202517901] [2023-11-06 22:16:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:21,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:21,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202517901] [2023-11-06 22:16:21,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202517901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:21,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:21,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028247149] [2023-11-06 22:16:21,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:21,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 355 [2023-11-06 22:16:21,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:21,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 355 [2023-11-06 22:16:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:23,328 INFO L124 PetriNetUnfolderBase]: 6710/11304 cut-off events. [2023-11-06 22:16:23,328 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-06 22:16:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21994 conditions, 11304 events. 6710/11304 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 83204 event pairs, 3185 based on Foata normal form. 530/7370 useless extension candidates. Maximal degree in co-relation 2515. Up to 10596 conditions per place. [2023-11-06 22:16:23,428 INFO L140 encePairwiseOnDemand]: 332/355 looper letters, 63 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-06 22:16:23,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 298 flow [2023-11-06 22:16:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:16:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-11-06 22:16:23,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-06 22:16:23,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-11-06 22:16:23,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-11-06 22:16:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-11-06 22:16:23,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:23,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:23,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:23,441 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 174 flow. Second operand 3 states and 568 transitions. [2023-11-06 22:16:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 298 flow [2023-11-06 22:16:23,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:16:23,447 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 150 flow [2023-11-06 22:16:23,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-06 22:16:23,453 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-11-06 22:16:23,454 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 150 flow [2023-11-06 22:16:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:23,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:23,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:23,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:16:23,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:23,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash 30391, now seen corresponding path program 1 times [2023-11-06 22:16:23,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:23,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139893948] [2023-11-06 22:16:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139893948] [2023-11-06 22:16:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139893948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:23,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028979841] [2023-11-06 22:16:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:23,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:23,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 355 [2023-11-06 22:16:23,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 355 [2023-11-06 22:16:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:25,023 INFO L124 PetriNetUnfolderBase]: 5943/9849 cut-off events. [2023-11-06 22:16:25,023 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-11-06 22:16:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19983 conditions, 9849 events. 5943/9849 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 69704 event pairs, 5148 based on Foata normal form. 0/6331 useless extension candidates. Maximal degree in co-relation 19881. Up to 8179 conditions per place. [2023-11-06 22:16:25,096 INFO L140 encePairwiseOnDemand]: 350/355 looper letters, 71 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-11-06 22:16:25,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 346 flow [2023-11-06 22:16:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:16:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-06 22:16:25,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098591549295775 [2023-11-06 22:16:25,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-06 22:16:25,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-06 22:16:25,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:25,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-06 22:16:25,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,107 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 150 flow. Second operand 3 states and 543 transitions. [2023-11-06 22:16:25,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 346 flow [2023-11-06 22:16:25,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:16:25,114 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 150 flow [2023-11-06 22:16:25,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-11-06 22:16:25,117 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-06 22:16:25,117 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 150 flow [2023-11-06 22:16:25,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:25,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:16:25,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:16:25,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:25,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1975953194, now seen corresponding path program 1 times [2023-11-06 22:16:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:25,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174582672] [2023-11-06 22:16:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:25,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:25,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174582672] [2023-11-06 22:16:25,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174582672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:25,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274879146] [2023-11-06 22:16:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:25,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:25,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:16:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:25,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:25,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:25,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:16:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:25,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:25,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274879146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:25,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:16:25,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951159164] [2023-11-06 22:16:25,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:25,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:16:25,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:16:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:25,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 355 [2023-11-06 22:16:25,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:25,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 355 [2023-11-06 22:16:25,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:27,276 INFO L124 PetriNetUnfolderBase]: 5461/8919 cut-off events. [2023-11-06 22:16:27,276 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-11-06 22:16:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18476 conditions, 8919 events. 5461/8919 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 64513 event pairs, 1 based on Foata normal form. 14/6140 useless extension candidates. Maximal degree in co-relation 15556. Up to 7052 conditions per place. [2023-11-06 22:16:27,337 INFO L140 encePairwiseOnDemand]: 351/355 looper letters, 110 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-11-06 22:16:27,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 125 transitions, 508 flow [2023-11-06 22:16:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 892 transitions. [2023-11-06 22:16:27,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025352112676056 [2023-11-06 22:16:27,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 892 transitions. [2023-11-06 22:16:27,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 892 transitions. [2023-11-06 22:16:27,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:27,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 892 transitions. [2023-11-06 22:16:27,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:27,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:27,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:27,355 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 150 flow. Second operand 5 states and 892 transitions. [2023-11-06 22:16:27,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 125 transitions, 508 flow [2023-11-06 22:16:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 502 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:27,412 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 148 flow [2023-11-06 22:16:27,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-06 22:16:27,414 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-11-06 22:16:27,415 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 148 flow [2023-11-06 22:16:27,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:27,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:27,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:16:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:27,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:27,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1975688962, now seen corresponding path program 1 times [2023-11-06 22:16:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135924983] [2023-11-06 22:16:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:27,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135924983] [2023-11-06 22:16:27,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135924983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:27,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:27,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270448036] [2023-11-06 22:16:27,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:27,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:27,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:27,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:28,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 355 [2023-11-06 22:16:28,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:28,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:28,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 355 [2023-11-06 22:16:28,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:29,001 INFO L124 PetriNetUnfolderBase]: 4351/7636 cut-off events. [2023-11-06 22:16:29,001 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2023-11-06 22:16:29,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15309 conditions, 7636 events. 4351/7636 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 56356 event pairs, 153 based on Foata normal form. 205/5430 useless extension candidates. Maximal degree in co-relation 14763. Up to 5525 conditions per place. [2023-11-06 22:16:29,048 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 104 selfloop transitions, 7 changer transitions 0/122 dead transitions. [2023-11-06 22:16:29,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 122 transitions, 518 flow [2023-11-06 22:16:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:16:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:16:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1045 transitions. [2023-11-06 22:16:29,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49061032863849763 [2023-11-06 22:16:29,073 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1045 transitions. [2023-11-06 22:16:29,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1045 transitions. [2023-11-06 22:16:29,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:29,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1045 transitions. [2023-11-06 22:16:29,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:29,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:29,098 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:29,098 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 6 states and 1045 transitions. [2023-11-06 22:16:29,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 122 transitions, 518 flow [2023-11-06 22:16:29,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 122 transitions, 501 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:16:29,103 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 152 flow [2023-11-06 22:16:29,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-06 22:16:29,104 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-06 22:16:29,104 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 152 flow [2023-11-06 22:16:29,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:29,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:29,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:16:29,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:29,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1116817130, now seen corresponding path program 1 times [2023-11-06 22:16:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394939854] [2023-11-06 22:16:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:29,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394939854] [2023-11-06 22:16:29,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394939854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:29,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:29,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960227263] [2023-11-06 22:16:29,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:29,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:29,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 355 [2023-11-06 22:16:29,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:29,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:29,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 355 [2023-11-06 22:16:29,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:30,441 INFO L124 PetriNetUnfolderBase]: 3605/6323 cut-off events. [2023-11-06 22:16:30,441 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2023-11-06 22:16:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12996 conditions, 6323 events. 3605/6323 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 44828 event pairs, 138 based on Foata normal form. 0/5096 useless extension candidates. Maximal degree in co-relation 12484. Up to 4172 conditions per place. [2023-11-06 22:16:30,485 INFO L140 encePairwiseOnDemand]: 342/355 looper letters, 105 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2023-11-06 22:16:30,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 124 transitions, 527 flow [2023-11-06 22:16:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-11-06 22:16:30,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771830985915493 [2023-11-06 22:16:30,491 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-11-06 22:16:30,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-11-06 22:16:30,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:30,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-11-06 22:16:30,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:30,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:30,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:30,501 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 152 flow. Second operand 5 states and 847 transitions. [2023-11-06 22:16:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 124 transitions, 527 flow [2023-11-06 22:16:30,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 124 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:16:30,511 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 215 flow [2023-11-06 22:16:30,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-06 22:16:30,513 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-06 22:16:30,513 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 215 flow [2023-11-06 22:16:30,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:30,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:30,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:30,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:16:30,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:30,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1425625730, now seen corresponding path program 1 times [2023-11-06 22:16:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:30,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756339942] [2023-11-06 22:16:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:30,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756339942] [2023-11-06 22:16:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756339942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300133062] [2023-11-06 22:16:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:30,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:30,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:16:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:16:30,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:30,831 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 [2023-11-06 22:16:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:16:30,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300133062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:30,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:30,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-06 22:16:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538164100] [2023-11-06 22:16:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:31,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 355 [2023-11-06 22:16:31,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:31,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 355 [2023-11-06 22:16:31,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:31,724 INFO L124 PetriNetUnfolderBase]: 2787/5224 cut-off events. [2023-11-06 22:16:31,724 INFO L125 PetriNetUnfolderBase]: For 2796/2971 co-relation queries the response was YES. [2023-11-06 22:16:31,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11974 conditions, 5224 events. 2787/5224 cut-off events. For 2796/2971 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 36545 event pairs, 122 based on Foata normal form. 183/4440 useless extension candidates. Maximal degree in co-relation 10469. Up to 4320 conditions per place. [2023-11-06 22:16:31,766 INFO L140 encePairwiseOnDemand]: 351/355 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-11-06 22:16:31,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 494 flow [2023-11-06 22:16:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:16:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-11-06 22:16:31,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4922535211267606 [2023-11-06 22:16:31,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-11-06 22:16:31,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-11-06 22:16:31,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:31,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-11-06 22:16:31,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,781 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 215 flow. Second operand 4 states and 699 transitions. [2023-11-06 22:16:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 494 flow [2023-11-06 22:16:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 481 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:31,788 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 208 flow [2023-11-06 22:16:31,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-11-06 22:16:31,791 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-11-06 22:16:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 208 flow [2023-11-06 22:16:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:16:31,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:31,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a2c2bf-3313-4fd6-b995-b8273688833e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:31,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-06 22:16:31,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1252776200, now seen corresponding path program 1 times [2023-11-06 22:16:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:31,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922223667] [2023-11-06 22:16:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:31,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:16:32,016 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:16:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:16:32,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:16:32,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:16:32,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-11-06 22:16:32,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-11-06 22:16:32,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2023-11-06 22:16:32,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2023-11-06 22:16:32,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-11-06 22:16:32,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-11-06 22:16:32,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-11-06 22:16:32,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-11-06 22:16:32,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-11-06 22:16:32,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-11-06 22:16:32,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-11-06 22:16:32,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-11-06 22:16:32,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2023-11-06 22:16:32,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:16:32,047 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:32,049 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:16:32,049 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:16:32,090 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:16:32,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,202 INFO L124 PetriNetUnfolderBase]: 54/500 cut-off events. [2023-11-06 22:16:32,202 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:16:32,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 500 events. 54/500 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2086 event pairs, 1 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 335. Up to 16 conditions per place. [2023-11-06 22:16:32,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:16:32,211 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 489 flow [2023-11-06 22:16:32,283 INFO L124 PetriNetUnfolderBase]: 54/500 cut-off events. [2023-11-06 22:16:32,283 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:16:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 500 events. 54/500 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2086 event pairs, 1 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 335. Up to 16 conditions per place. [2023-11-06 22:16:32,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 26568 [2023-11-06 22:16:37,689 INFO L134 LiptonReduction]: Checked pairs total: 74551 [2023-11-06 22:16:37,689 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-06 22:16:37,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:37,692 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;@2c3e6861, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:37,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-06 22:16:37,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:16:37,693 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:16:37,694 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:16:37,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:37,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:37,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 22:16:37,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 45380, now seen corresponding path program 1 times [2023-11-06 22:16:37,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:37,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818496859] [2023-11-06 22:16:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:37,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818496859] [2023-11-06 22:16:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818496859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:37,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:37,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202518982] [2023-11-06 22:16:37,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:37,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:37,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 427 [2023-11-06 22:16:37,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:37,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:37,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 427 [2023-11-06 22:16:37,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:56,079 INFO L124 PetriNetUnfolderBase]: 120489/180767 cut-off events. [2023-11-06 22:16:56,079 INFO L125 PetriNetUnfolderBase]: For 2290/2290 co-relation queries the response was YES. [2023-11-06 22:16:56,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349048 conditions, 180767 events. 120489/180767 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 5706. Compared 1560354 event pairs, 78469 based on Foata normal form. 12512/126509 useless extension candidates. Maximal degree in co-relation 24466. Up to 166872 conditions per place. [2023-11-06 22:16:57,431 INFO L140 encePairwiseOnDemand]: 396/427 looper letters, 75 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-06 22:16:57,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 371 flow [2023-11-06 22:16:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:16:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-11-06 22:16:57,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409836065573771 [2023-11-06 22:16:57,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-11-06 22:16:57,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-11-06 22:16:57,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:57,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-11-06 22:16:57,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:57,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:57,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:57,450 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 239 flow. Second operand 3 states and 693 transitions. [2023-11-06 22:16:57,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 371 flow [2023-11-06 22:16:57,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 371 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:16:57,455 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 199 flow [2023-11-06 22:16:57,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2023-11-06 22:16:57,457 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2023-11-06 22:16:57,458 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 199 flow [2023-11-06 22:16:57,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:57,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:57,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:16:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:16:57,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 22:16:57,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 45381, now seen corresponding path program 1 times [2023-11-06 22:16:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:57,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792671798] [2023-11-06 22:16:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:57,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792671798] [2023-11-06 22:16:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792671798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:57,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:57,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:16:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349809241] [2023-11-06 22:16:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:57,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 427 [2023-11-06 22:16:57,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:57,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:57,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 427 [2023-11-06 22:16:57,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:14,611 INFO L124 PetriNetUnfolderBase]: 105986/156533 cut-off events. [2023-11-06 22:17:14,611 INFO L125 PetriNetUnfolderBase]: For 7221/7221 co-relation queries the response was YES. [2023-11-06 22:17:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312511 conditions, 156533 events. 105986/156533 cut-off events. For 7221/7221 co-relation queries the response was YES. Maximal size of possible extension queue 4920. Compared 1309745 event pairs, 90585 based on Foata normal form. 0/103020 useless extension candidates. Maximal degree in co-relation 312408. Up to 125826 conditions per place. [2023-11-06 22:17:15,610 INFO L140 encePairwiseOnDemand]: 422/427 looper letters, 94 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-11-06 22:17:15,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 463 flow [2023-11-06 22:17:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2023-11-06 22:17:15,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-06 22:17:15,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2023-11-06 22:17:15,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2023-11-06 22:17:15,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:15,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2023-11-06 22:17:15,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:15,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:15,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:15,624 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 199 flow. Second operand 3 states and 671 transitions. [2023-11-06 22:17:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 463 flow [2023-11-06 22:17:15,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:15,639 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 199 flow [2023-11-06 22:17:15,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2023-11-06 22:17:15,640 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2023-11-06 22:17:15,641 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 199 flow [2023-11-06 22:17:15,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:15,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:15,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:17:15,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:17:15,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-06 22:17:15,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1004397945, now seen corresponding path program 1 times [2023-11-06 22:17:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:15,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957971603] [2023-11-06 22:17:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957971603] [2023-11-06 22:17:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957971603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:15,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:15,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837208434] [2023-11-06 22:17:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:15,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:17:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:17:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:17:15,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 427 [2023-11-06 22:17:15,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:15,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:15,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 427 [2023-11-06 22:17:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand