./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:58,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:58,731 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:21:58,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:58,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:58,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:58,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:58,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:58,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:58,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:58,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:58,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:58,773 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:58,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:58,774 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:58,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:58,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:58,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:58,777 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:21:58,777 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:21:58,778 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:21:58,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:58,779 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:21:58,779 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:21:58,780 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:58,780 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:58,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:58,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:58,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:58,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:58,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:58,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:58,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:58,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:58,785 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:58,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:58,786 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:58,786 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:58,787 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_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2023-11-06 22:21:59,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:59,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:59,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:59,101 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:59,102 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:59,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2023-11-06 22:22:02,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:02,494 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:02,495 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2023-11-06 22:22:02,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/data/4948e3088/99292bcb2852473c8426ef9c59407e51/FLAGfd9e33dd0 [2023-11-06 22:22:02,519 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/data/4948e3088/99292bcb2852473c8426ef9c59407e51 [2023-11-06 22:22:02,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:02,524 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:02,525 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:02,525 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:02,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:02,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd140f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02, skipping insertion in model container [2023-11-06 22:22:02,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,559 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:02,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:02,748 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:22:02,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:02,803 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:22:02,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02 WrapperNode [2023-11-06 22:22:02,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:02,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:02,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:22:02,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:22:02,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,844 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-06 22:22:02,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:02,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:22:02,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:22:02,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:22:02,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,882 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,890 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:22:02,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:22:02,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:22:02,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:22:02,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:02,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:02,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:22:02,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:22:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:22:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:22:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:22:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:22:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:22:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:22:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:22:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:22:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:22:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:22:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:22:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:22:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:22:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:22:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:22:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:22:02,988 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:22:03,099 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:22:03,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:22:03,426 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:22:03,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:22:03,436 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:22:03,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:03 BoogieIcfgContainer [2023-11-06 22:22:03,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:22:03,442 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:22:03,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:22:03,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:22:03,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:22:02" (1/3) ... [2023-11-06 22:22:03,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168c7c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:03, skipping insertion in model container [2023-11-06 22:22:03,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02" (2/3) ... [2023-11-06 22:22:03,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168c7c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:03, skipping insertion in model container [2023-11-06 22:22:03,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:03" (3/3) ... [2023-11-06 22:22:03,449 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2023-11-06 22:22:03,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:22:03,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 22:22:03,471 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:22:03,635 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:22:03,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 173 transitions, 374 flow [2023-11-06 22:22:03,792 INFO L124 PetriNetUnfolderBase]: 10/169 cut-off events. [2023-11-06 22:22:03,793 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:03,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 169 events. 10/169 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-06 22:22:03,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 173 transitions, 374 flow [2023-11-06 22:22:03,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 164 transitions, 352 flow [2023-11-06 22:22:03,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:22:03,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 164 transitions, 352 flow [2023-11-06 22:22:03,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 164 transitions, 352 flow [2023-11-06 22:22:03,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 164 transitions, 352 flow [2023-11-06 22:22:03,872 INFO L124 PetriNetUnfolderBase]: 10/164 cut-off events. [2023-11-06 22:22:03,873 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:03,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 164 events. 10/164 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-06 22:22:03,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2023-11-06 22:22:10,212 INFO L134 LiptonReduction]: Checked pairs total: 3975 [2023-11-06 22:22:10,212 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-06 22:22:10,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:22:10,255 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;@3337cfad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:22:10,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-06 22:22:10,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:22:10,258 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:22:10,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:22:10,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:10,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:22:10,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:10,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash 634, now seen corresponding path program 1 times [2023-11-06 22:22:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953249891] [2023-11-06 22:22:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:10,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953249891] [2023-11-06 22:22:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953249891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:10,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:22:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610779911] [2023-11-06 22:22:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:22:10,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:22:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:22:10,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-11-06 22:22:10,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:10,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-11-06 22:22:10,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:10,645 INFO L124 PetriNetUnfolderBase]: 513/692 cut-off events. [2023-11-06 22:22:10,645 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:22:10,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 692 events. 513/692 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1641 event pairs, 249 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 1020. Up to 693 conditions per place. [2023-11-06 22:22:10,660 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 39 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2023-11-06 22:22:10,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 180 flow [2023-11-06 22:22:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:22:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:22:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2023-11-06 22:22:10,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528023598820059 [2023-11-06 22:22:10,688 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2023-11-06 22:22:10,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2023-11-06 22:22:10,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:10,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2023-11-06 22:22:10,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,709 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,711 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 2 states and 358 transitions. [2023-11-06 22:22:10,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 180 flow [2023-11-06 22:22:10,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:22:10,722 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 86 flow [2023-11-06 22:22:10,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-06 22:22:10,730 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-11-06 22:22:10,730 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 86 flow [2023-11-06 22:22:10,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:10,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:10,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:22:10,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:22:10,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:10,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 624257, now seen corresponding path program 1 times [2023-11-06 22:22:10,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:10,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140960188] [2023-11-06 22:22:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140960188] [2023-11-06 22:22:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140960188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:11,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988393083] [2023-11-06 22:22:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:11,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:11,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:11,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-11-06 22:22:11,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:11,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-11-06 22:22:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:11,438 INFO L124 PetriNetUnfolderBase]: 487/656 cut-off events. [2023-11-06 22:22:11,438 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:11,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 656 events. 487/656 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1531 event pairs, 236 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 1327. Up to 656 conditions per place. [2023-11-06 22:22:11,444 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-06 22:22:11,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 156 flow [2023-11-06 22:22:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-11-06 22:22:11,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48672566371681414 [2023-11-06 22:22:11,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-11-06 22:22:11,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-11-06 22:22:11,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:11,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-11-06 22:22:11,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,456 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 86 flow. Second operand 3 states and 495 transitions. [2023-11-06 22:22:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 156 flow [2023-11-06 22:22:11,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:22:11,459 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 84 flow [2023-11-06 22:22:11,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-06 22:22:11,460 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-11-06 22:22:11,460 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 84 flow [2023-11-06 22:22:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:11,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:22:11,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:22:11,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:11,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 624258, now seen corresponding path program 1 times [2023-11-06 22:22:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199797147] [2023-11-06 22:22:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:11,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199797147] [2023-11-06 22:22:11,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199797147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:11,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:11,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176761151] [2023-11-06 22:22:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:11,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-11-06 22:22:11,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-11-06 22:22:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:11,826 INFO L124 PetriNetUnfolderBase]: 461/620 cut-off events. [2023-11-06 22:22:11,826 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:11,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 620 events. 461/620 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1418 event pairs, 223 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 1256. Up to 620 conditions per place. [2023-11-06 22:22:11,832 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 34 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-06 22:22:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 150 flow [2023-11-06 22:22:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-11-06 22:22:11,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670599803343166 [2023-11-06 22:22:11,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-11-06 22:22:11,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-11-06 22:22:11,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:11,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-11-06 22:22:11,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,842 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 84 flow. Second operand 3 states and 475 transitions. [2023-11-06 22:22:11,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 150 flow [2023-11-06 22:22:11,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:11,846 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 81 flow [2023-11-06 22:22:11,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-11-06 22:22:11,848 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -11 predicate places. [2023-11-06 22:22:11,848 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 81 flow [2023-11-06 22:22:11,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:11,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:11,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:22:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:22:11,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:11,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 599926793, now seen corresponding path program 1 times [2023-11-06 22:22:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382789699] [2023-11-06 22:22:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382789699] [2023-11-06 22:22:11,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382789699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:11,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:11,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890662541] [2023-11-06 22:22:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:11,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:12,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-11-06 22:22:12,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:12,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-11-06 22:22:12,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:12,191 INFO L124 PetriNetUnfolderBase]: 445/596 cut-off events. [2023-11-06 22:22:12,191 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:12,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 596 events. 445/596 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1349 event pairs, 215 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1209. Up to 596 conditions per place. [2023-11-06 22:22:12,219 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 32 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-06 22:22:12,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 143 flow [2023-11-06 22:22:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-11-06 22:22:12,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46509341199606685 [2023-11-06 22:22:12,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-11-06 22:22:12,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-11-06 22:22:12,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:12,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-11-06 22:22:12,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,230 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 81 flow. Second operand 3 states and 473 transitions. [2023-11-06 22:22:12,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 143 flow [2023-11-06 22:22:12,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:12,233 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 78 flow [2023-11-06 22:22:12,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-06 22:22:12,236 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2023-11-06 22:22:12,236 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 78 flow [2023-11-06 22:22:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:12,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:22:12,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:22:12,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:12,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash 599926794, now seen corresponding path program 1 times [2023-11-06 22:22:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:12,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294243341] [2023-11-06 22:22:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294243341] [2023-11-06 22:22:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294243341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077249983] [2023-11-06 22:22:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:12,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:12,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-11-06 22:22:12,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:12,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-11-06 22:22:12,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:12,576 INFO L124 PetriNetUnfolderBase]: 429/572 cut-off events. [2023-11-06 22:22:12,577 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 572 events. 429/572 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1291 event pairs, 207 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 1162. Up to 572 conditions per place. [2023-11-06 22:22:12,582 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-06 22:22:12,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 136 flow [2023-11-06 22:22:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-06 22:22:12,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808259587020649 [2023-11-06 22:22:12,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-06 22:22:12,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-06 22:22:12,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:12,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-06 22:22:12,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,591 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 78 flow. Second operand 3 states and 489 transitions. [2023-11-06 22:22:12,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 136 flow [2023-11-06 22:22:12,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:12,593 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 75 flow [2023-11-06 22:22:12,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-06 22:22:12,594 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-11-06 22:22:12,594 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 75 flow [2023-11-06 22:22:12,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:12,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:22:12,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:12,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1004043546, now seen corresponding path program 1 times [2023-11-06 22:22:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:12,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060095599] [2023-11-06 22:22:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:12,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060095599] [2023-11-06 22:22:12,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060095599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:12,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:12,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:12,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771905341] [2023-11-06 22:22:12,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:12,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:12,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-11-06 22:22:12,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-11-06 22:22:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:12,832 INFO L124 PetriNetUnfolderBase]: 403/536 cut-off events. [2023-11-06 22:22:12,832 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:12,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 536 events. 403/536 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1179 event pairs, 194 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1091. Up to 536 conditions per place. [2023-11-06 22:22:12,837 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-06 22:22:12,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 129 flow [2023-11-06 22:22:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-06 22:22:12,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47885939036381514 [2023-11-06 22:22:12,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-06 22:22:12,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-06 22:22:12,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:12,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-06 22:22:12,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,847 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 75 flow. Second operand 3 states and 487 transitions. [2023-11-06 22:22:12,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 129 flow [2023-11-06 22:22:12,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:12,849 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 72 flow [2023-11-06 22:22:12,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-06 22:22:12,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -14 predicate places. [2023-11-06 22:22:12,850 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 72 flow [2023-11-06 22:22:12,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:12,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:12,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:22:12,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:12,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1004043545, now seen corresponding path program 1 times [2023-11-06 22:22:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:12,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877592427] [2023-11-06 22:22:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877592427] [2023-11-06 22:22:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877592427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:12,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:12,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974815175] [2023-11-06 22:22:12,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:12,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-11-06 22:22:12,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-11-06 22:22:12,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:13,104 INFO L124 PetriNetUnfolderBase]: 377/500 cut-off events. [2023-11-06 22:22:13,105 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:13,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 500 events. 377/500 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1074 event pairs, 181 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 1020. Up to 500 conditions per place. [2023-11-06 22:22:13,110 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-06 22:22:13,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 122 flow [2023-11-06 22:22:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-06 22:22:13,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591937069813176 [2023-11-06 22:22:13,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-06 22:22:13,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-06 22:22:13,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:13,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-06 22:22:13,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,125 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 72 flow. Second operand 3 states and 467 transitions. [2023-11-06 22:22:13,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 122 flow [2023-11-06 22:22:13,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:13,128 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 69 flow [2023-11-06 22:22:13,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-11-06 22:22:13,129 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-11-06 22:22:13,130 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 69 flow [2023-11-06 22:22:13,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:13,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:13,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:22:13,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:13,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1481779019, now seen corresponding path program 1 times [2023-11-06 22:22:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712149734] [2023-11-06 22:22:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:13,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:13,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:13,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712149734] [2023-11-06 22:22:13,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712149734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:13,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:13,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:22:13,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213681386] [2023-11-06 22:22:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:13,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:13,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:13,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:13,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 69 flow. Second operand has 6 states, 6 states have (on average 135.5) internal successors, (813), 6 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:13,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:13,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:13,590 INFO L124 PetriNetUnfolderBase]: 313/420 cut-off events. [2023-11-06 22:22:13,590 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:13,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 420 events. 313/420 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 850 event pairs, 149 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 861. Up to 420 conditions per place. [2023-11-06 22:22:13,594 INFO L140 encePairwiseOnDemand]: 337/339 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-06 22:22:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 119 flow [2023-11-06 22:22:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-11-06 22:22:13,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218289085545723 [2023-11-06 22:22:13,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-11-06 22:22:13,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-11-06 22:22:13,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:13,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-11-06 22:22:13,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,602 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 69 flow. Second operand 3 states and 429 transitions. [2023-11-06 22:22:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 119 flow [2023-11-06 22:22:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:13,605 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 68 flow [2023-11-06 22:22:13,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-11-06 22:22:13,609 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-11-06 22:22:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 68 flow [2023-11-06 22:22:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.5) internal successors, (813), 6 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:22:13,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:13,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1481779017, now seen corresponding path program 1 times [2023-11-06 22:22:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108456047] [2023-11-06 22:22:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108456047] [2023-11-06 22:22:13,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108456047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:22:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004380392] [2023-11-06 22:22:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:13,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:14,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-11-06 22:22:14,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:14,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-11-06 22:22:14,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:14,169 INFO L124 PetriNetUnfolderBase]: 249/340 cut-off events. [2023-11-06 22:22:14,169 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:22:14,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 340 events. 249/340 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 641 event pairs, 117 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 702. Up to 340 conditions per place. [2023-11-06 22:22:14,172 INFO L140 encePairwiseOnDemand]: 337/339 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-06 22:22:14,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 116 flow [2023-11-06 22:22:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-06 22:22:14,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45624385447394294 [2023-11-06 22:22:14,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-06 22:22:14,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-06 22:22:14,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:14,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-06 22:22:14,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,181 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 68 flow. Second operand 3 states and 464 transitions. [2023-11-06 22:22:14,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 116 flow [2023-11-06 22:22:14,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:14,183 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 67 flow [2023-11-06 22:22:14,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-06 22:22:14,184 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-11-06 22:22:14,184 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 67 flow [2023-11-06 22:22:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:14,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:14,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:22:14,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:14,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash -930567232, now seen corresponding path program 1 times [2023-11-06 22:22:14,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:14,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990467062] [2023-11-06 22:22:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990467062] [2023-11-06 22:22:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990467062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296098373] [2023-11-06 22:22:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:14,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 339 [2023-11-06 22:22:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 339 [2023-11-06 22:22:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:14,596 INFO L124 PetriNetUnfolderBase]: 497/677 cut-off events. [2023-11-06 22:22:14,596 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:22:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 677 events. 497/677 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1771 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1391. Up to 471 conditions per place. [2023-11-06 22:22:14,602 INFO L140 encePairwiseOnDemand]: 333/339 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-11-06 22:22:14,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 212 flow [2023-11-06 22:22:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-11-06 22:22:14,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40707964601769914 [2023-11-06 22:22:14,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-11-06 22:22:14,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-11-06 22:22:14,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:14,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-11-06 22:22:14,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,611 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 67 flow. Second operand 3 states and 414 transitions. [2023-11-06 22:22:14,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 212 flow [2023-11-06 22:22:14,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:14,613 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 99 flow [2023-11-06 22:22:14,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-06 22:22:14,614 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-11-06 22:22:14,615 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 99 flow [2023-11-06 22:22:14,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:14,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:14,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:22:14,616 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:14,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1732030387, now seen corresponding path program 1 times [2023-11-06 22:22:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:14,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539378490] [2023-11-06 22:22:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:14,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539378490] [2023-11-06 22:22:14,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539378490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:14,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:14,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262572346] [2023-11-06 22:22:14,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:14,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:14,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:14,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:14,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:14,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:15,114 INFO L124 PetriNetUnfolderBase]: 683/941 cut-off events. [2023-11-06 22:22:15,114 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-11-06 22:22:15,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 941 events. 683/941 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2913 event pairs, 35 based on Foata normal form. 42/983 useless extension candidates. Maximal degree in co-relation 2384. Up to 461 conditions per place. [2023-11-06 22:22:15,122 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 72 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2023-11-06 22:22:15,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 82 transitions, 413 flow [2023-11-06 22:22:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2023-11-06 22:22:15,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440117994100295 [2023-11-06 22:22:15,126 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2023-11-06 22:22:15,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2023-11-06 22:22:15,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:15,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2023-11-06 22:22:15,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,134 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 99 flow. Second operand 5 states and 746 transitions. [2023-11-06 22:22:15,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 82 transitions, 413 flow [2023-11-06 22:22:15,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 82 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:15,137 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 159 flow [2023-11-06 22:22:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-06 22:22:15,138 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-11-06 22:22:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 159 flow [2023-11-06 22:22:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:15,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:22:15,139 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:15,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1301441724, now seen corresponding path program 1 times [2023-11-06 22:22:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:15,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139155466] [2023-11-06 22:22:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:15,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:15,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139155466] [2023-11-06 22:22:15,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139155466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:15,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590901168] [2023-11-06 22:22:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:15,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:15,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:22:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:15,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:15,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590901168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:15,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:22:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649265679] [2023-11-06 22:22:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:15,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:15,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 139.66666666666666) internal successors, (838), 6 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:15,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:15,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:16,151 INFO L124 PetriNetUnfolderBase]: 1195/1655 cut-off events. [2023-11-06 22:22:16,152 INFO L125 PetriNetUnfolderBase]: For 1736/1736 co-relation queries the response was YES. [2023-11-06 22:22:16,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4949 conditions, 1655 events. 1195/1655 cut-off events. For 1736/1736 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5658 event pairs, 235 based on Foata normal form. 60/1715 useless extension candidates. Maximal degree in co-relation 4942. Up to 652 conditions per place. [2023-11-06 22:22:16,167 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 90 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2023-11-06 22:22:16,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 98 transitions, 613 flow [2023-11-06 22:22:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 744 transitions. [2023-11-06 22:22:16,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389380530973451 [2023-11-06 22:22:16,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 744 transitions. [2023-11-06 22:22:16,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 744 transitions. [2023-11-06 22:22:16,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:16,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 744 transitions. [2023-11-06 22:22:16,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,180 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 159 flow. Second operand 5 states and 744 transitions. [2023-11-06 22:22:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 98 transitions, 613 flow [2023-11-06 22:22:16,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 98 transitions, 613 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:22:16,185 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 214 flow [2023-11-06 22:22:16,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-06 22:22:16,186 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-06 22:22:16,186 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 214 flow [2023-11-06 22:22:16,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.66666666666666) internal successors, (838), 6 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:16,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:16,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:16,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash 86258704, now seen corresponding path program 1 times [2023-11-06 22:22:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:16,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995885447] [2023-11-06 22:22:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995885447] [2023-11-06 22:22:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995885447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953177548] [2023-11-06 22:22:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:16,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:16,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:22:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:16,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953177548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:16,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:22:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650343999] [2023-11-06 22:22:16,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:16,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:16,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:16,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:16,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:17,441 INFO L124 PetriNetUnfolderBase]: 1725/2411 cut-off events. [2023-11-06 22:22:17,441 INFO L125 PetriNetUnfolderBase]: For 4301/4301 co-relation queries the response was YES. [2023-11-06 22:22:17,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 2411 events. 1725/2411 cut-off events. For 4301/4301 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9207 event pairs, 477 based on Foata normal form. 92/2503 useless extension candidates. Maximal degree in co-relation 8842. Up to 1005 conditions per place. [2023-11-06 22:22:17,467 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 96 selfloop transitions, 10 changer transitions 0/106 dead transitions. [2023-11-06 22:22:17,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 106 transitions, 704 flow [2023-11-06 22:22:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-11-06 22:22:17,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44365781710914454 [2023-11-06 22:22:17,476 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-11-06 22:22:17,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-11-06 22:22:17,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:17,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-11-06 22:22:17,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:17,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:17,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:17,484 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 214 flow. Second operand 5 states and 752 transitions. [2023-11-06 22:22:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 106 transitions, 704 flow [2023-11-06 22:22:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 106 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:22:17,503 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 270 flow [2023-11-06 22:22:17,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-06 22:22:17,504 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-11-06 22:22:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 270 flow [2023-11-06 22:22:17,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:17,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:17,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:17,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:22:17,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:17,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash -636855976, now seen corresponding path program 1 times [2023-11-06 22:22:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:17,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83165230] [2023-11-06 22:22:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83165230] [2023-11-06 22:22:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83165230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789754399] [2023-11-06 22:22:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:17,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:17,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:17,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:17,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:17,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:17,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:17,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:17,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:18,412 INFO L124 PetriNetUnfolderBase]: 1677/2363 cut-off events. [2023-11-06 22:22:18,412 INFO L125 PetriNetUnfolderBase]: For 6139/6139 co-relation queries the response was YES. [2023-11-06 22:22:18,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9423 conditions, 2363 events. 1677/2363 cut-off events. For 6139/6139 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9338 event pairs, 77 based on Foata normal form. 48/2411 useless extension candidates. Maximal degree in co-relation 9409. Up to 969 conditions per place. [2023-11-06 22:22:18,442 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 104 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-11-06 22:22:18,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 114 transitions, 905 flow [2023-11-06 22:22:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-11-06 22:22:18,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377581120943953 [2023-11-06 22:22:18,447 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-11-06 22:22:18,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-11-06 22:22:18,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:18,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-11-06 22:22:18,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,454 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 270 flow. Second operand 5 states and 742 transitions. [2023-11-06 22:22:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 114 transitions, 905 flow [2023-11-06 22:22:18,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 114 transitions, 876 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:18,475 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 322 flow [2023-11-06 22:22:18,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-06 22:22:18,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-11-06 22:22:18,476 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 322 flow [2023-11-06 22:22:18,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:18,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:22:18,477 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:18,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1605393910, now seen corresponding path program 2 times [2023-11-06 22:22:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399317953] [2023-11-06 22:22:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:18,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:18,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399317953] [2023-11-06 22:22:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399317953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:18,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:18,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145460374] [2023-11-06 22:22:18,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:18,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:18,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:18,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 322 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:18,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:19,188 INFO L124 PetriNetUnfolderBase]: 1475/2065 cut-off events. [2023-11-06 22:22:19,188 INFO L125 PetriNetUnfolderBase]: For 5583/5583 co-relation queries the response was YES. [2023-11-06 22:22:19,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8816 conditions, 2065 events. 1475/2065 cut-off events. For 5583/5583 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7789 event pairs, 77 based on Foata normal form. 42/2107 useless extension candidates. Maximal degree in co-relation 8800. Up to 818 conditions per place. [2023-11-06 22:22:19,218 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 100 selfloop transitions, 9 changer transitions 2/111 dead transitions. [2023-11-06 22:22:19,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 881 flow [2023-11-06 22:22:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-11-06 22:22:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43716814159292033 [2023-11-06 22:22:19,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-11-06 22:22:19,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-11-06 22:22:19,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:19,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-11-06 22:22:19,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,229 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,229 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 322 flow. Second operand 5 states and 741 transitions. [2023-11-06 22:22:19,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 881 flow [2023-11-06 22:22:19,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 868 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:19,252 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 322 flow [2023-11-06 22:22:19,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-11-06 22:22:19,253 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-11-06 22:22:19,254 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 322 flow [2023-11-06 22:22:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:19,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:22:19,255 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:19,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash 571176598, now seen corresponding path program 2 times [2023-11-06 22:22:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371159286] [2023-11-06 22:22:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371159286] [2023-11-06 22:22:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371159286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254066914] [2023-11-06 22:22:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:19,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:19,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:22:19,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:22:19,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:19,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:19,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:19,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:19,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254066914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:19,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:19,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:22:19,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475512892] [2023-11-06 22:22:19,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:19,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:19,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:19,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:19,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:19,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:20,427 INFO L124 PetriNetUnfolderBase]: 1719/2393 cut-off events. [2023-11-06 22:22:20,428 INFO L125 PetriNetUnfolderBase]: For 6750/6750 co-relation queries the response was YES. [2023-11-06 22:22:20,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10508 conditions, 2393 events. 1719/2393 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8959 event pairs, 311 based on Foata normal form. 84/2477 useless extension candidates. Maximal degree in co-relation 10491. Up to 1357 conditions per place. [2023-11-06 22:22:20,449 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-11-06 22:22:20,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 893 flow [2023-11-06 22:22:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 738 transitions. [2023-11-06 22:22:20,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353982300884956 [2023-11-06 22:22:20,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 738 transitions. [2023-11-06 22:22:20,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 738 transitions. [2023-11-06 22:22:20,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:20,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 738 transitions. [2023-11-06 22:22:20,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:20,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:20,462 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:20,462 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 322 flow. Second operand 5 states and 738 transitions. [2023-11-06 22:22:20,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 893 flow [2023-11-06 22:22:20,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 884 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:20,476 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 363 flow [2023-11-06 22:22:20,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-11-06 22:22:20,477 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-11-06 22:22:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 363 flow [2023-11-06 22:22:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:20,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:20,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:20,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:22:20,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:22:20,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:20,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1802864140, now seen corresponding path program 2 times [2023-11-06 22:22:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096711962] [2023-11-06 22:22:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096711962] [2023-11-06 22:22:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096711962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:20,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818511748] [2023-11-06 22:22:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:20,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:20,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:20,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 363 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:20,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:20,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:20,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:21,328 INFO L124 PetriNetUnfolderBase]: 1441/1985 cut-off events. [2023-11-06 22:22:21,329 INFO L125 PetriNetUnfolderBase]: For 7482/7482 co-relation queries the response was YES. [2023-11-06 22:22:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9289 conditions, 1985 events. 1441/1985 cut-off events. For 7482/7482 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7381 event pairs, 61 based on Foata normal form. 34/2019 useless extension candidates. Maximal degree in co-relation 9269. Up to 818 conditions per place. [2023-11-06 22:22:21,348 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 114 selfloop transitions, 9 changer transitions 4/127 dead transitions. [2023-11-06 22:22:21,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 127 transitions, 1094 flow [2023-11-06 22:22:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-11-06 22:22:21,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43952802359882004 [2023-11-06 22:22:21,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-11-06 22:22:21,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-11-06 22:22:21,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:21,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-11-06 22:22:21,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:21,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:21,362 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:21,362 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 363 flow. Second operand 5 states and 745 transitions. [2023-11-06 22:22:21,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 127 transitions, 1094 flow [2023-11-06 22:22:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 1020 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:21,378 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 354 flow [2023-11-06 22:22:21,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-11-06 22:22:21,379 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-11-06 22:22:21,379 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 354 flow [2023-11-06 22:22:21,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:21,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:21,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:22:21,380 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:21,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1576987723, now seen corresponding path program 2 times [2023-11-06 22:22:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182506779] [2023-11-06 22:22:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182506779] [2023-11-06 22:22:21,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182506779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495280004] [2023-11-06 22:22:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:21,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:21,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:21,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:22:21,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:22:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:21,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:21,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:21,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:21,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495280004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:21,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:21,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:22:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981847104] [2023-11-06 22:22:21,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:21,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:21,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 339 [2023-11-06 22:22:21,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:21,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:21,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 339 [2023-11-06 22:22:21,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:22,478 INFO L124 PetriNetUnfolderBase]: 1657/2269 cut-off events. [2023-11-06 22:22:22,479 INFO L125 PetriNetUnfolderBase]: For 7596/7596 co-relation queries the response was YES. [2023-11-06 22:22:22,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10618 conditions, 2269 events. 1657/2269 cut-off events. For 7596/7596 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8106 event pairs, 481 based on Foata normal form. 68/2337 useless extension candidates. Maximal degree in co-relation 10598. Up to 1331 conditions per place. [2023-11-06 22:22:22,497 INFO L140 encePairwiseOnDemand]: 334/339 looper letters, 117 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2023-11-06 22:22:22,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 1049 flow [2023-11-06 22:22:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-11-06 22:22:22,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377581120943953 [2023-11-06 22:22:22,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-11-06 22:22:22,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-11-06 22:22:22,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:22,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-11-06 22:22:22,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,509 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 354 flow. Second operand 5 states and 742 transitions. [2023-11-06 22:22:22,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 1049 flow [2023-11-06 22:22:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 125 transitions, 1042 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:22,522 INFO L231 Difference]: Finished difference. Result has 77 places, 53 transitions, 401 flow [2023-11-06 22:22:22,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=77, PETRI_TRANSITIONS=53} [2023-11-06 22:22:22,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 26 predicate places. [2023-11-06 22:22:22,523 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 53 transitions, 401 flow [2023-11-06 22:22:22,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:22,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:22,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:22:22,730 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:22:22,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -405575520, now seen corresponding path program 1 times [2023-11-06 22:22:22,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:22,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011740662] [2023-11-06 22:22:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:23,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011740662] [2023-11-06 22:22:23,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011740662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657707373] [2023-11-06 22:22:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:23,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:23,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:23,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c040ae-6c96-439c-9ec5-d32b9e6e8921/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:22:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:39,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:22:39,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:50,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657707373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:10,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:24:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-06 22:24:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566498699] [2023-11-06 22:24:10,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:24:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:24:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=167, Unknown=19, NotChecked=0, Total=240 [2023-11-06 22:24:13,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:15,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:17,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:19,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:21,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:23,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:25,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:26,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 339 [2023-11-06 22:24:26,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 53 transitions, 401 flow. Second operand has 16 states, 16 states have (on average 113.875) internal successors, (1822), 16 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:26,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:26,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 339 [2023-11-06 22:24:26,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:48,979 WARN L293 SmtUtils]: Spent 21.58s on a formula simplification. DAG size of input: 76 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:24:51,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:53,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:55,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:05,164 WARN L293 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 69 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:25:07,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:09,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:11,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:13,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:15,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:18,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:20,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:22,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:24,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:26,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:30,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:35,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:39,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:42,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:44,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:46,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:48,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:50,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:52,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:54,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:56,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:25:57,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:00,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:02,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:04,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:06,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:08,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:10,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:12,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:26:14,887 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* (div c_~x4~0 4294967296) 4294967296))) (let ((.cse1 (+ (* 4294967296 (div c_~x3~0 4294967296)) c_~x4~0)) (.cse2 (+ c_~x3~0 .cse3)) (.cse0 (mod c_~x1~0 4294967296)) (.cse5 (mod (div c_~x3~0 128) 4294967296)) (.cse4 (mod c_~n~0 4294967296))) (and (= (mod c_~x3~0 128) 0) (= .cse0 (mod c_~x2~0 4294967296)) (or (= .cse1 .cse2) (< (+ 2 (* 4294967296 (div c_~n~0 4294967296)) c_~x4~0) (+ c_~n~0 .cse3))) (<= .cse1 .cse2) (<= .cse4 (mod c_~x3~0 4294967296)) (= .cse5 (mod (* (div (* (- 1) c_~x4~0) 128) 4294967295) 4294967296)) (<= 1 .cse0) (= (+ c_~x1~0 (* (div c_~x2~0 4294967296) 4294967296)) (+ (* 4294967296 (div c_~x1~0 4294967296)) c_~x2~0)) (= (mod (* 127 c_~x4~0) 128) 0) (<= (+ .cse5 1) .cse4)))) is different from false