./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:27:36,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:27:37,007 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:27:37,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:27:37,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:27:37,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:27:37,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:27:37,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:27:37,069 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:27:37,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:27:37,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:27:37,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:27:37,079 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:27:37,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:27:37,082 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:27:37,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:27:37,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:27:37,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:27:37,084 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:27:37,085 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:27:37,086 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:27:37,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:27:37,087 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:27:37,088 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:27:37,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:27:37,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:27:37,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:27:37,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:27:37,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:27:37,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:27:37,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:37,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:27:37,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:27:37,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:27:37,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:27:37,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:27:37,097 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:27:37,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:27:37,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:27:37,098 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_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 [2023-11-23 22:27:37,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:27:37,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:27:37,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:27:37,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:27:37,545 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:27:37,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-23 22:27:40,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:27:41,090 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:27:41,091 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-23 22:27:41,101 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/data/25b6ff17f/a960517560834e8a903ebac4eb9c070b/FLAGd75d464cf [2023-11-23 22:27:41,118 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/data/25b6ff17f/a960517560834e8a903ebac4eb9c070b [2023-11-23 22:27:41,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:27:41,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:27:41,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:41,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:27:41,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:27:41,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddf40bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41, skipping insertion in model container [2023-11-23 22:27:41,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,168 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:27:41,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:41,464 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:27:41,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:41,559 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:27:41,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41 WrapperNode [2023-11-23 22:27:41,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:41,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:41,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:27:41,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:27:41,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,618 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2023-11-23 22:27:41,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:41,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:27:41,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:27:41,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:27:41,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,684 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:27:41,685 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:27:41,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:27:41,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:27:41,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (1/1) ... [2023-11-23 22:27:41,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:41,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:41,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:41,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bcdab-8a6e-45bc-ae89-a187075f570b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:27:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:27:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:27:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:27:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:27:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:27:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:27:41,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:27:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-23 22:27:41,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-23 22:27:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:27:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-23 22:27:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-23 22:27:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-23 22:27:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-23 22:27:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:27:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:27:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:27:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:27:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:27:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:27:41,783 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:27:41,923 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:27:41,927 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:27:42,352 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:27:42,769 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:27:42,770 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:27:42,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:42 BoogieIcfgContainer [2023-11-23 22:27:42,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:27:42,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:27:42,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:27:42,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:27:42,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:41" (1/3) ... [2023-11-23 22:27:42,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d41d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:42, skipping insertion in model container [2023-11-23 22:27:42,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:41" (2/3) ... [2023-11-23 22:27:42,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d41d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:42, skipping insertion in model container [2023-11-23 22:27:42,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:42" (3/3) ... [2023-11-23 22:27:42,789 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2023-11-23 22:27:42,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:27:42,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-23 22:27:42,815 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:27:42,926 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-23 22:27:42,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 89 transitions, 220 flow [2023-11-23 22:27:43,079 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-23 22:27:43,080 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:27:43,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 83 events. 6/83 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-23 22:27:43,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 89 transitions, 220 flow [2023-11-23 22:27:43,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 82 transitions, 200 flow [2023-11-23 22:27:43,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:27:43,130 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;@27372c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:27:43,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-23 22:27:43,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:27:43,144 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-23 22:27:43,144 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:27:43,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:43,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:27:43,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:43,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash 14341, now seen corresponding path program 1 times [2023-11-23 22:27:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409398384] [2023-11-23 22:27:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409398384] [2023-11-23 22:27:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409398384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:44,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:44,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482485861] [2023-11-23 22:27:44,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:44,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:27:44,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:44,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:27:44,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:48,188 INFO L124 PetriNetUnfolderBase]: 21468/27414 cut-off events. [2023-11-23 22:27:48,188 INFO L125 PetriNetUnfolderBase]: For 1131/1131 co-relation queries the response was YES. [2023-11-23 22:27:48,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53019 conditions, 27414 events. 21468/27414 cut-off events. For 1131/1131 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 124119 event pairs, 10249 based on Foata normal form. 1/14936 useless extension candidates. Maximal degree in co-relation 46079. Up to 24505 conditions per place. [2023-11-23 22:27:48,554 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-11-23 22:27:48,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 260 flow [2023-11-23 22:27:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-23 22:27:48,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7116104868913857 [2023-11-23 22:27:48,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-23 22:27:48,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-23 22:27:48,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:48,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-23 22:27:48,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:48,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:48,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:48,594 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 200 flow. Second operand 3 states and 190 transitions. [2023-11-23 22:27:48,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 260 flow [2023-11-23 22:27:48,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 236 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-23 22:27:48,651 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 170 flow [2023-11-23 22:27:48,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-11-23 22:27:48,658 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -14 predicate places. [2023-11-23 22:27:48,658 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 170 flow [2023-11-23 22:27:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:48,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:27:48,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:27:48,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:48,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash 14342, now seen corresponding path program 1 times [2023-11-23 22:27:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444724763] [2023-11-23 22:27:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:48,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:49,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444724763] [2023-11-23 22:27:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444724763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:49,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:49,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869461915] [2023-11-23 22:27:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:49,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:49,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-23 22:27:49,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-23 22:27:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:51,254 INFO L124 PetriNetUnfolderBase]: 15636/20368 cut-off events. [2023-11-23 22:27:51,254 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-23 22:27:51,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38679 conditions, 20368 events. 15636/20368 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 94021 event pairs, 7333 based on Foata normal form. 730/11737 useless extension candidates. Maximal degree in co-relation 38673. Up to 17943 conditions per place. [2023-11-23 22:27:51,458 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 31 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-23 22:27:51,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 230 flow [2023-11-23 22:27:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-23 22:27:51,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-11-23 22:27:51,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-23 22:27:51,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-23 22:27:51,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:51,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-23 22:27:51,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,474 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 170 flow. Second operand 3 states and 193 transitions. [2023-11-23 22:27:51,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 230 flow [2023-11-23 22:27:51,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:51,479 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 167 flow [2023-11-23 22:27:51,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2023-11-23 22:27:51,481 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -15 predicate places. [2023-11-23 22:27:51,481 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 167 flow [2023-11-23 22:27:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:51,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:27:51,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:27:51,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:51,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash 427692243, now seen corresponding path program 1 times [2023-11-23 22:27:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143644826] [2023-11-23 22:27:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:51,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:51,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143644826] [2023-11-23 22:27:51,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143644826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:51,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:51,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527424877] [2023-11-23 22:27:51,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:51,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:51,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:51,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:27:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:27:51,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:53,673 INFO L124 PetriNetUnfolderBase]: 17256/22066 cut-off events. [2023-11-23 22:27:53,673 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-23 22:27:53,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42243 conditions, 22066 events. 17256/22066 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 97427 event pairs, 8144 based on Foata normal form. 0/12182 useless extension candidates. Maximal degree in co-relation 42236. Up to 19808 conditions per place. [2023-11-23 22:27:53,870 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-11-23 22:27:53,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 231 flow [2023-11-23 22:27:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:27:53,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:27:53,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:27:53,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:27:53,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:53,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:27:53,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:53,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:53,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:53,876 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 167 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:27:53,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 231 flow [2023-11-23 22:27:53,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:53,879 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 164 flow [2023-11-23 22:27:53,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-11-23 22:27:53,881 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -16 predicate places. [2023-11-23 22:27:53,881 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 164 flow [2023-11-23 22:27:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:53,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:53,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:27:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:27:53,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:53,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash 427692244, now seen corresponding path program 1 times [2023-11-23 22:27:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:53,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993399184] [2023-11-23 22:27:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:54,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993399184] [2023-11-23 22:27:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993399184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:54,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672081994] [2023-11-23 22:27:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:54,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:54,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-23 22:27:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:54,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:54,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-23 22:27:54,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:55,825 INFO L124 PetriNetUnfolderBase]: 15636/20040 cut-off events. [2023-11-23 22:27:55,825 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-23 22:27:55,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38353 conditions, 20040 events. 15636/20040 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 88620 event pairs, 7333 based on Foata normal form. 246/11253 useless extension candidates. Maximal degree in co-relation 38345. Up to 17943 conditions per place. [2023-11-23 22:27:56,227 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 31 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-11-23 22:27:56,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 224 flow [2023-11-23 22:27:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-23 22:27:56,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-11-23 22:27:56,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-23 22:27:56,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-23 22:27:56,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:56,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-23 22:27:56,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:56,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:56,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:56,236 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 164 flow. Second operand 3 states and 193 transitions. [2023-11-23 22:27:56,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 224 flow [2023-11-23 22:27:56,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:56,242 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 161 flow [2023-11-23 22:27:56,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-11-23 22:27:56,245 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -17 predicate places. [2023-11-23 22:27:56,245 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 161 flow [2023-11-23 22:27:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:56,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:56,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:27:56,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1787902301, now seen corresponding path program 1 times [2023-11-23 22:27:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375882890] [2023-11-23 22:27:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:56,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:56,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375882890] [2023-11-23 22:27:56,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375882890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:56,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:56,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933575016] [2023-11-23 22:27:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:56,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:56,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-23 22:27:56,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:56,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:56,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-23 22:27:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:58,773 INFO L124 PetriNetUnfolderBase]: 15636/19980 cut-off events. [2023-11-23 22:27:58,774 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-23 22:27:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38294 conditions, 19980 events. 15636/19980 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 87907 event pairs, 7333 based on Foata normal form. 90/11097 useless extension candidates. Maximal degree in co-relation 38285. Up to 17943 conditions per place. [2023-11-23 22:27:58,928 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 31 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-23 22:27:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 221 flow [2023-11-23 22:27:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-23 22:27:58,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-11-23 22:27:58,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-23 22:27:58,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-23 22:27:58,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:58,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-23 22:27:58,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,936 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 161 flow. Second operand 3 states and 193 transitions. [2023-11-23 22:27:58,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 221 flow [2023-11-23 22:27:58,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:58,941 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 158 flow [2023-11-23 22:27:58,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-23 22:27:58,944 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -18 predicate places. [2023-11-23 22:27:58,945 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 158 flow [2023-11-23 22:27:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:58,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:27:58,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:27:58,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1787902302, now seen corresponding path program 1 times [2023-11-23 22:27:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:58,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022464941] [2023-11-23 22:27:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:59,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:59,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022464941] [2023-11-23 22:27:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022464941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:59,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:59,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390617050] [2023-11-23 22:27:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:59,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:27:59,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:59,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:59,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:27:59,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:01,153 INFO L124 PetriNetUnfolderBase]: 16076/20442 cut-off events. [2023-11-23 22:28:01,154 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-11-23 22:28:01,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39284 conditions, 20442 events. 16076/20442 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 88627 event pairs, 7556 based on Foata normal form. 0/11293 useless extension candidates. Maximal degree in co-relation 39274. Up to 18470 conditions per place. [2023-11-23 22:28:01,307 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-23 22:28:01,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 222 flow [2023-11-23 22:28:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:28:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:28:01,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:28:01,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:28:01,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:01,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:28:01,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:01,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:01,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:01,315 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 158 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:28:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 222 flow [2023-11-23 22:28:01,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 68 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:01,318 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 155 flow [2023-11-23 22:28:01,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-11-23 22:28:01,320 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -19 predicate places. [2023-11-23 22:28:01,320 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 155 flow [2023-11-23 22:28:01,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:01,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:01,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:28:01,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:01,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1507578779, now seen corresponding path program 1 times [2023-11-23 22:28:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594556577] [2023-11-23 22:28:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:01,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:01,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594556577] [2023-11-23 22:28:01,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594556577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:01,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:01,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:01,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126889613] [2023-11-23 22:28:01,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:01,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:01,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:28:01,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:01,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:01,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:28:01,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:03,296 INFO L124 PetriNetUnfolderBase]: 15792/20074 cut-off events. [2023-11-23 22:28:03,296 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-11-23 22:28:03,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38591 conditions, 20074 events. 15792/20074 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 87182 event pairs, 7420 based on Foata normal form. 0/11151 useless extension candidates. Maximal degree in co-relation 38580. Up to 18144 conditions per place. [2023-11-23 22:28:03,432 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-23 22:28:03,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 66 transitions, 219 flow [2023-11-23 22:28:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:28:03,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:28:03,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:28:03,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:28:03,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:03,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:28:03,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,439 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 155 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:28:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 66 transitions, 219 flow [2023-11-23 22:28:03,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:03,448 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 152 flow [2023-11-23 22:28:03,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-23 22:28:03,449 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -20 predicate places. [2023-11-23 22:28:03,449 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 152 flow [2023-11-23 22:28:03,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:03,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:03,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:28:03,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:03,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1507578778, now seen corresponding path program 1 times [2023-11-23 22:28:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:03,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108575682] [2023-11-23 22:28:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108575682] [2023-11-23 22:28:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108575682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:03,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848747850] [2023-11-23 22:28:03,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:03,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:03,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:03,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:28:03,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:03,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:28:03,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:05,599 INFO L124 PetriNetUnfolderBase]: 15792/20038 cut-off events. [2023-11-23 22:28:05,599 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-11-23 22:28:05,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38556 conditions, 20038 events. 15792/20038 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 86851 event pairs, 7420 based on Foata normal form. 0/11115 useless extension candidates. Maximal degree in co-relation 38544. Up to 18144 conditions per place. [2023-11-23 22:28:05,763 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-23 22:28:05,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 216 flow [2023-11-23 22:28:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:28:05,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:28:05,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:28:05,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:28:05,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:05,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:28:05,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:05,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:05,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:05,774 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 152 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:28:05,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 216 flow [2023-11-23 22:28:05,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:05,777 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 149 flow [2023-11-23 22:28:05,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-23 22:28:05,778 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -21 predicate places. [2023-11-23 22:28:05,779 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 149 flow [2023-11-23 22:28:05,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:05,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:05,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:05,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:28:05,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:05,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash 194065715, now seen corresponding path program 1 times [2023-11-23 22:28:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923415226] [2023-11-23 22:28:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:05,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:05,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:05,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923415226] [2023-11-23 22:28:05,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923415226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:05,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:05,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:05,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295582258] [2023-11-23 22:28:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:05,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:05,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-23 22:28:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:06,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:06,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-23 22:28:06,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:07,770 INFO L124 PetriNetUnfolderBase]: 15636/19788 cut-off events. [2023-11-23 22:28:07,770 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-23 22:28:07,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38106 conditions, 19788 events. 15636/19788 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 85306 event pairs, 7333 based on Foata normal form. 90/11097 useless extension candidates. Maximal degree in co-relation 38093. Up to 17943 conditions per place. [2023-11-23 22:28:07,931 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 31 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-23 22:28:07,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 62 transitions, 209 flow [2023-11-23 22:28:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-23 22:28:07,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-11-23 22:28:07,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-23 22:28:07,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-23 22:28:07,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:07,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-23 22:28:07,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:07,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:07,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:07,937 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 149 flow. Second operand 3 states and 193 transitions. [2023-11-23 22:28:07,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 62 transitions, 209 flow [2023-11-23 22:28:07,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 62 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:07,940 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 146 flow [2023-11-23 22:28:07,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-11-23 22:28:07,942 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -22 predicate places. [2023-11-23 22:28:07,942 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 146 flow [2023-11-23 22:28:07,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:07,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:07,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:07,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:28:07,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:07,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 194065714, now seen corresponding path program 1 times [2023-11-23 22:28:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:07,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586076765] [2023-11-23 22:28:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:08,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:08,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586076765] [2023-11-23 22:28:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586076765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:08,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932124748] [2023-11-23 22:28:08,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:08,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:08,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:08,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:08,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:28:08,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:08,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:08,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:28:08,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:10,133 INFO L124 PetriNetUnfolderBase]: 15876/20002 cut-off events. [2023-11-23 22:28:10,133 INFO L125 PetriNetUnfolderBase]: For 362/362 co-relation queries the response was YES. [2023-11-23 22:28:10,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 20002 events. 15876/20002 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 85267 event pairs, 7480 based on Foata normal form. 0/11160 useless extension candidates. Maximal degree in co-relation 38610. Up to 18246 conditions per place. [2023-11-23 22:28:10,292 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-23 22:28:10,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 210 flow [2023-11-23 22:28:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:28:10,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:28:10,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:28:10,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:28:10,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:10,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:28:10,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,297 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 146 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:28:10,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 210 flow [2023-11-23 22:28:10,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:10,300 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 143 flow [2023-11-23 22:28:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-11-23 22:28:10,302 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -23 predicate places. [2023-11-23 22:28:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 143 flow [2023-11-23 22:28:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:10,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:28:10,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 386168834, now seen corresponding path program 1 times [2023-11-23 22:28:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137650582] [2023-11-23 22:28:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:10,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:10,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137650582] [2023-11-23 22:28:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137650582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:10,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:10,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129016252] [2023-11-23 22:28:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:10,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2023-11-23 22:28:10,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:10,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2023-11-23 22:28:10,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:12,121 INFO L124 PetriNetUnfolderBase]: 16504/20514 cut-off events. [2023-11-23 22:28:12,121 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2023-11-23 22:28:12,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39867 conditions, 20514 events. 16504/20514 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 84844 event pairs, 7848 based on Foata normal form. 0/11606 useless extension candidates. Maximal degree in co-relation 39852. Up to 18976 conditions per place. [2023-11-23 22:28:12,291 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 33 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-23 22:28:12,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 58 transitions, 207 flow [2023-11-23 22:28:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-23 22:28:12,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2023-11-23 22:28:12,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-23 22:28:12,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-23 22:28:12,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:12,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-23 22:28:12,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:12,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:12,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:12,297 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 143 flow. Second operand 3 states and 189 transitions. [2023-11-23 22:28:12,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 58 transitions, 207 flow [2023-11-23 22:28:12,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:12,300 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 140 flow [2023-11-23 22:28:12,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-11-23 22:28:12,301 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -24 predicate places. [2023-11-23 22:28:12,301 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 140 flow [2023-11-23 22:28:12,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:12,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:28:12,302 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:12,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 386168835, now seen corresponding path program 1 times [2023-11-23 22:28:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312983192] [2023-11-23 22:28:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312983192] [2023-11-23 22:28:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312983192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:12,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:12,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:28:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268202823] [2023-11-23 22:28:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:12,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:12,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:12,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2023-11-23 22:28:12,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:12,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:12,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2023-11-23 22:28:12,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:14,640 INFO L124 PetriNetUnfolderBase]: 15636/19400 cut-off events. [2023-11-23 22:28:14,641 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-23 22:28:14,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37721 conditions, 19400 events. 15636/19400 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 78701 event pairs, 7333 based on Foata normal form. 246/11253 useless extension candidates. Maximal degree in co-relation 37705. Up to 17943 conditions per place. [2023-11-23 22:28:14,827 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 31 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-23 22:28:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 56 transitions, 200 flow [2023-11-23 22:28:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-23 22:28:14,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228464419475655 [2023-11-23 22:28:14,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-23 22:28:14,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-23 22:28:14,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:14,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-23 22:28:14,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:14,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:14,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:14,833 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 140 flow. Second operand 3 states and 193 transitions. [2023-11-23 22:28:14,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 56 transitions, 200 flow [2023-11-23 22:28:14,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 56 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:14,836 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 137 flow [2023-11-23 22:28:14,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-11-23 22:28:14,839 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -25 predicate places. [2023-11-23 22:28:14,839 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 137 flow [2023-11-23 22:28:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:14,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:14,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:28:14,840 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:14,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -328782703, now seen corresponding path program 1 times [2023-11-23 22:28:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475534804] [2023-11-23 22:28:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:15,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:15,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475534804] [2023-11-23 22:28:15,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475534804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:15,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:15,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597741847] [2023-11-23 22:28:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:15,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 89 [2023-11-23 22:28:15,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:15,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:15,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 89 [2023-11-23 22:28:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:17,636 INFO L124 PetriNetUnfolderBase]: 18895/22789 cut-off events. [2023-11-23 22:28:17,636 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2023-11-23 22:28:17,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44973 conditions, 22789 events. 18895/22789 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 82482 event pairs, 1742 based on Foata normal form. 1/12908 useless extension candidates. Maximal degree in co-relation 44956. Up to 20725 conditions per place. [2023-11-23 22:28:18,141 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 53 selfloop transitions, 7 changer transitions 1/85 dead transitions. [2023-11-23 22:28:18,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 328 flow [2023-11-23 22:28:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-23 22:28:18,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.850187265917603 [2023-11-23 22:28:18,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-23 22:28:18,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-23 22:28:18,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:18,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-23 22:28:18,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:18,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:18,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:18,146 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 137 flow. Second operand 3 states and 227 transitions. [2023-11-23 22:28:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 328 flow [2023-11-23 22:28:18,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:18,150 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 183 flow [2023-11-23 22:28:18,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-11-23 22:28:18,151 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -23 predicate places. [2023-11-23 22:28:18,152 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 183 flow [2023-11-23 22:28:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:18,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:18,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:18,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:28:18,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:18,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash -580769967, now seen corresponding path program 1 times [2023-11-23 22:28:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311730648] [2023-11-23 22:28:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:18,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311730648] [2023-11-23 22:28:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311730648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:18,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:18,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749709911] [2023-11-23 22:28:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 89 [2023-11-23 22:28:18,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:18,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:18,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 89 [2023-11-23 22:28:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:21,016 INFO L124 PetriNetUnfolderBase]: 23913/28958 cut-off events. [2023-11-23 22:28:21,016 INFO L125 PetriNetUnfolderBase]: For 6360/6360 co-relation queries the response was YES. [2023-11-23 22:28:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70258 conditions, 28958 events. 23913/28958 cut-off events. For 6360/6360 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 111187 event pairs, 2290 based on Foata normal form. 294/29219 useless extension candidates. Maximal degree in co-relation 70239. Up to 12328 conditions per place. [2023-11-23 22:28:21,227 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 106 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2023-11-23 22:28:21,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 140 transitions, 641 flow [2023-11-23 22:28:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:28:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:28:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-11-23 22:28:21,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8561797752808988 [2023-11-23 22:28:21,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-11-23 22:28:21,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-11-23 22:28:21,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:21,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-11-23 22:28:21,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,235 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,235 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 183 flow. Second operand 5 states and 381 transitions. [2023-11-23 22:28:21,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 140 transitions, 641 flow [2023-11-23 22:28:21,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 629 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:21,246 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 241 flow [2023-11-23 22:28:21,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-11-23 22:28:21,247 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -18 predicate places. [2023-11-23 22:28:21,247 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 241 flow [2023-11-23 22:28:21,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:21,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:21,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:28:21,248 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:21,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash -498853281, now seen corresponding path program 1 times [2023-11-23 22:28:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:21,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008835538] [2023-11-23 22:28:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:21,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:21,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008835538] [2023-11-23 22:28:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008835538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:21,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:21,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:21,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452655845] [2023-11-23 22:28:21,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:21,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 89 [2023-11-23 22:28:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 89 [2023-11-23 22:28:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:25,447 INFO L124 PetriNetUnfolderBase]: 32161/39289 cut-off events. [2023-11-23 22:28:25,448 INFO L125 PetriNetUnfolderBase]: For 33469/33509 co-relation queries the response was YES. [2023-11-23 22:28:25,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111768 conditions, 39289 events. 32161/39289 cut-off events. For 33469/33509 co-relation queries the response was YES. Maximal size of possible extension queue 1274. Compared 167509 event pairs, 4659 based on Foata normal form. 792/39877 useless extension candidates. Maximal degree in co-relation 111746. Up to 18246 conditions per place. [2023-11-23 22:28:25,753 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 122 selfloop transitions, 8 changer transitions 0/154 dead transitions. [2023-11-23 22:28:25,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 154 transitions, 842 flow [2023-11-23 22:28:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:28:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:28:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 376 transitions. [2023-11-23 22:28:25,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8449438202247191 [2023-11-23 22:28:25,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 376 transitions. [2023-11-23 22:28:25,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 376 transitions. [2023-11-23 22:28:25,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:25,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 376 transitions. [2023-11-23 22:28:25,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:25,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:25,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:25,758 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 241 flow. Second operand 5 states and 376 transitions. [2023-11-23 22:28:25,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 154 transitions, 842 flow [2023-11-23 22:28:25,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 154 transitions, 842 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:28:25,779 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 296 flow [2023-11-23 22:28:25,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-11-23 22:28:25,780 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -11 predicate places. [2023-11-23 22:28:25,780 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 296 flow [2023-11-23 22:28:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:25,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:25,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:25,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:28:25,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-23 22:28:25,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash 403683292, now seen corresponding path program 1 times [2023-11-23 22:28:25,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:25,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728774936] [2023-11-23 22:28:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:25,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728774936] [2023-11-23 22:28:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728774936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:26,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:26,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643726689] [2023-11-23 22:28:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:26,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 89 [2023-11-23 22:28:26,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:26,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:26,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 89 [2023-11-23 22:28:26,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand