./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:43,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:44,033 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:19:44,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:44,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:44,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:44,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:44,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:44,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:44,069 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:44,070 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:44,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:44,071 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:44,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:44,072 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:44,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:44,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:44,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:44,074 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:19:44,074 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:19:44,075 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:19:44,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:44,076 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:19:44,076 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:19:44,076 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:44,077 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:44,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:44,078 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:44,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:44,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:44,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:44,079 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:44,080 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:44,080 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:19:44,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:19:44,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:44,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:44,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:44,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:44,081 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_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2023-11-21 22:19:44,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:44,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:44,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:44,349 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:44,349 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:44,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-21 22:19:47,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:19:47,741 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:19:47,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-21 22:19:47,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/data/b5e13ea9b/8add451b27c4476ca5bdd7ee77f71198/FLAG1ed193586 [2023-11-21 22:19:47,773 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/data/b5e13ea9b/8add451b27c4476ca5bdd7ee77f71198 [2023-11-21 22:19:47,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:19:47,785 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:19:47,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:47,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:19:47,794 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:19:47,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:47" (1/1) ... [2023-11-21 22:19:47,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f6e7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:47, skipping insertion in model container [2023-11-21 22:19:47,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:47" (1/1) ... [2023-11-21 22:19:47,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:19:48,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:48,080 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:19:48,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:48,121 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:19:48,121 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:19:48,130 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:19:48,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48 WrapperNode [2023-11-21 22:19:48,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:48,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:48,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:19:48,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:19:48,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,169 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2023-11-21 22:19:48,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:48,171 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:19:48,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:19:48,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:19:48,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,184 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:19:48,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:19:48,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:19:48,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:19:48,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (1/1) ... [2023-11-21 22:19:48,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:48,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:19:48,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:19:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:19:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 22:19:48,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 22:19:48,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 22:19:48,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 22:19:48,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:19:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:19:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:19:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:19:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:19:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:19:48,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:19:48,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:19:48,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:19:48,296 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:19:48,390 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:19:48,392 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:19:48,707 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:19:48,952 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:19:48,953 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:19:48,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:48 BoogieIcfgContainer [2023-11-21 22:19:48,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:19:48,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:19:48,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:19:48,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:19:48,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:19:47" (1/3) ... [2023-11-21 22:19:48,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e2fee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:48, skipping insertion in model container [2023-11-21 22:19:48,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:48" (2/3) ... [2023-11-21 22:19:48,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e2fee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:48, skipping insertion in model container [2023-11-21 22:19:48,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:48" (3/3) ... [2023-11-21 22:19:48,965 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-21 22:19:48,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:19:48,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-21 22:19:48,986 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:19:49,063 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 22:19:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-21 22:19:49,131 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-21 22:19:49,132 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:19:49,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 2/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-21 22:19:49,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-21 22:19:49,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-21 22:19:49,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:19:49,159 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;@3ee66542, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:19:49,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-21 22:19:49,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:19:49,163 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:19:49,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:19:49,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:49,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:19:49,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:49,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 8522, now seen corresponding path program 1 times [2023-11-21 22:19:49,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115760238] [2023-11-21 22:19:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:49,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115760238] [2023-11-21 22:19:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115760238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970221759] [2023-11-21 22:19:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:49,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:49,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:49,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:49,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-21 22:19:49,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:49,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-21 22:19:49,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:49,656 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2023-11-21 22:19:49,656 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-21 22:19:49,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 126 events. 55/126 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 343 event pairs, 34 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 191. Up to 95 conditions per place. [2023-11-21 22:19:49,661 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-21 22:19:49,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 102 flow [2023-11-21 22:19:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-21 22:19:49,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2023-11-21 22:19:49,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-21 22:19:49,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-21 22:19:49,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:49,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-21 22:19:49,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,689 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 67 transitions. [2023-11-21 22:19:49,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 102 flow [2023-11-21 22:19:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:19:49,699 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-21 22:19:49,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-21 22:19:49,708 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-21 22:19:49,709 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-21 22:19:49,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:49,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:19:49,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:19:49,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:49,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash 8523, now seen corresponding path program 1 times [2023-11-21 22:19:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451053380] [2023-11-21 22:19:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:49,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:49,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451053380] [2023-11-21 22:19:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451053380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:49,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:49,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751036126] [2023-11-21 22:19:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:49,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:49,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:50,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:19:50,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:50,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:19:50,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:50,128 INFO L124 PetriNetUnfolderBase]: 37/91 cut-off events. [2023-11-21 22:19:50,128 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-21 22:19:50,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 91 events. 37/91 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 238 event pairs, 22 based on Foata normal form. 10/92 useless extension candidates. Maximal degree in co-relation 160. Up to 67 conditions per place. [2023-11-21 22:19:50,165 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-21 22:19:50,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 88 flow [2023-11-21 22:19:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-21 22:19:50,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-21 22:19:50,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:50,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,186 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 70 transitions. [2023-11-21 22:19:50,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 88 flow [2023-11-21 22:19:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:50,194 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-21 22:19:50,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-21 22:19:50,195 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-21 22:19:50,196 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-21 22:19:50,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:50,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:19:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:19:50,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:50,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash 254099552, now seen corresponding path program 1 times [2023-11-21 22:19:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217029236] [2023-11-21 22:19:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217029236] [2023-11-21 22:19:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217029236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:50,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164610727] [2023-11-21 22:19:50,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:50,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:50,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-21 22:19:50,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:50,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-21 22:19:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:50,366 INFO L124 PetriNetUnfolderBase]: 43/98 cut-off events. [2023-11-21 22:19:50,367 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:19:50,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 98 events. 43/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 233 event pairs, 26 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 179. Up to 79 conditions per place. [2023-11-21 22:19:50,368 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-21 22:19:50,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 89 flow [2023-11-21 22:19:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-21 22:19:50,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-21 22:19:50,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-21 22:19:50,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-21 22:19:50,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:50,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-21 22:19:50,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,372 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 66 transitions. [2023-11-21 22:19:50,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 89 flow [2023-11-21 22:19:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:50,374 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-21 22:19:50,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-21 22:19:50,375 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-21 22:19:50,375 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-21 22:19:50,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:50,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:19:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:19:50,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:50,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash 254099553, now seen corresponding path program 1 times [2023-11-21 22:19:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:50,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783163666] [2023-11-21 22:19:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783163666] [2023-11-21 22:19:50,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783163666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:50,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:50,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:50,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763751341] [2023-11-21 22:19:50,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:50,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:50,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:50,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:19:50,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:50,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:19:50,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:50,514 INFO L124 PetriNetUnfolderBase]: 37/85 cut-off events. [2023-11-21 22:19:50,514 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-21 22:19:50,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 85 events. 37/85 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 203 event pairs, 22 based on Foata normal form. 5/87 useless extension candidates. Maximal degree in co-relation 154. Up to 67 conditions per place. [2023-11-21 22:19:50,516 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-21 22:19:50,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 82 flow [2023-11-21 22:19:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-21 22:19:50,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-21 22:19:50,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:50,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-21 22:19:50,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,520 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 70 transitions. [2023-11-21 22:19:50,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 82 flow [2023-11-21 22:19:50,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:50,522 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-21 22:19:50,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-21 22:19:50,523 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-21 22:19:50,523 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-21 22:19:50,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:50,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:19:50,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:50,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash -308859051, now seen corresponding path program 1 times [2023-11-21 22:19:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:50,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103832888] [2023-11-21 22:19:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:50,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103832888] [2023-11-21 22:19:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103832888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:50,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:50,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:19:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078941076] [2023-11-21 22:19:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:50,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-21 22:19:50,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:50,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-21 22:19:50,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:50,776 INFO L124 PetriNetUnfolderBase]: 73/162 cut-off events. [2023-11-21 22:19:50,777 INFO L125 PetriNetUnfolderBase]: For 5/7 co-relation queries the response was YES. [2023-11-21 22:19:50,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 162 events. 73/162 cut-off events. For 5/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 538 event pairs, 22 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 298. Up to 74 conditions per place. [2023-11-21 22:19:50,782 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-11-21 22:19:50,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 128 flow [2023-11-21 22:19:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-21 22:19:50,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2023-11-21 22:19:50,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-21 22:19:50,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-21 22:19:50,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:50,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-21 22:19:50,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,795 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 3 states and 83 transitions. [2023-11-21 22:19:50,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 128 flow [2023-11-21 22:19:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:50,797 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 66 flow [2023-11-21 22:19:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-21 22:19:50,801 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-21 22:19:50,801 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 66 flow [2023-11-21 22:19:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:50,802 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] [2023-11-21 22:19:50,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:19:50,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:50,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash -457354806, now seen corresponding path program 1 times [2023-11-21 22:19:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:50,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307790766] [2023-11-21 22:19:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307790766] [2023-11-21 22:19:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307790766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:50,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:50,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:19:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454293623] [2023-11-21 22:19:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:19:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:50,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:19:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:19:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:19:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:51,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:19:51,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:51,102 INFO L124 PetriNetUnfolderBase]: 142/274 cut-off events. [2023-11-21 22:19:51,103 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-21 22:19:51,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 274 events. 142/274 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1002 event pairs, 81 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 543. Up to 179 conditions per place. [2023-11-21 22:19:51,107 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-21 22:19:51,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 131 flow [2023-11-21 22:19:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:19:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:19:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-21 22:19:51,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2023-11-21 22:19:51,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-21 22:19:51,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-21 22:19:51,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:51,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-21 22:19:51,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,113 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 4 states and 97 transitions. [2023-11-21 22:19:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 131 flow [2023-11-21 22:19:51,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:51,117 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-21 22:19:51,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-21 22:19:51,120 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-21 22:19:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-21 22:19:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:51,121 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] [2023-11-21 22:19:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:19:51,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -613517268, now seen corresponding path program 1 times [2023-11-21 22:19:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232291864] [2023-11-21 22:19:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:51,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232291864] [2023-11-21 22:19:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232291864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622259217] [2023-11-21 22:19:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:51,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:51,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:51,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:19:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:51,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:19:51,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:51,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622259217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:52,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:52,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-21 22:19:52,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491513027] [2023-11-21 22:19:52,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:52,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:19:52,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:19:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:19:52,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:19:52,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 19 states, 19 states have (on average 19.526315789473685) internal successors, (371), 19 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:52,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:52,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:19:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:53,071 INFO L124 PetriNetUnfolderBase]: 402/734 cut-off events. [2023-11-21 22:19:53,071 INFO L125 PetriNetUnfolderBase]: For 191/194 co-relation queries the response was YES. [2023-11-21 22:19:53,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 734 events. 402/734 cut-off events. For 191/194 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3315 event pairs, 5 based on Foata normal form. 3/683 useless extension candidates. Maximal degree in co-relation 1719. Up to 148 conditions per place. [2023-11-21 22:19:53,080 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 90 selfloop transitions, 28 changer transitions 19/143 dead transitions. [2023-11-21 22:19:53,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 710 flow [2023-11-21 22:19:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:19:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-21 22:19:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 422 transitions. [2023-11-21 22:19:53,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895424836601307 [2023-11-21 22:19:53,085 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 422 transitions. [2023-11-21 22:19:53,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 422 transitions. [2023-11-21 22:19:53,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:53,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 422 transitions. [2023-11-21 22:19:53,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 24.823529411764707) internal successors, (422), 17 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,091 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,091 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 17 states and 422 transitions. [2023-11-21 22:19:53,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 710 flow [2023-11-21 22:19:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 683 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:53,100 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 316 flow [2023-11-21 22:19:53,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=316, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-21 22:19:53,101 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-21 22:19:53,101 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 316 flow [2023-11-21 22:19:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.526315789473685) internal successors, (371), 19 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:53,102 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] [2023-11-21 22:19:53,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:19:53,316 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:53,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash 342415400, now seen corresponding path program 2 times [2023-11-21 22:19:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885054071] [2023-11-21 22:19:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:19:53,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885054071] [2023-11-21 22:19:53,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885054071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102225446] [2023-11-21 22:19:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:19:53,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:53,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:53,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:19:53,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:19:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:53,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:19:53,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:19:53,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:19:53,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102225446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:53,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:19:53,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-21 22:19:53,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125008581] [2023-11-21 22:19:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:53,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:19:53,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:19:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:19:53,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:19:53,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:53,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:19:53,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:53,874 INFO L124 PetriNetUnfolderBase]: 379/699 cut-off events. [2023-11-21 22:19:53,874 INFO L125 PetriNetUnfolderBase]: For 1344/1347 co-relation queries the response was YES. [2023-11-21 22:19:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 699 events. 379/699 cut-off events. For 1344/1347 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3048 event pairs, 92 based on Foata normal form. 6/704 useless extension candidates. Maximal degree in co-relation 2428. Up to 582 conditions per place. [2023-11-21 22:19:53,885 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 55 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2023-11-21 22:19:53,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 521 flow [2023-11-21 22:19:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:19:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:19:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2023-11-21 22:19:53,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 22:19:53,887 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 120 transitions. [2023-11-21 22:19:53,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 120 transitions. [2023-11-21 22:19:53,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:53,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 120 transitions. [2023-11-21 22:19:53,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,889 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 316 flow. Second operand 5 states and 120 transitions. [2023-11-21 22:19:53,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 521 flow [2023-11-21 22:19:53,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 497 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:53,902 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 358 flow [2023-11-21 22:19:53,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-11-21 22:19:53,904 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-21 22:19:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 358 flow [2023-11-21 22:19:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:53,905 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] [2023-11-21 22:19:53,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 22:19:54,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 22:19:54,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash 831569598, now seen corresponding path program 3 times [2023-11-21 22:19:54,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:54,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450465100] [2023-11-21 22:19:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:54,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:54,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450465100] [2023-11-21 22:19:54,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450465100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320010105] [2023-11-21 22:19:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:19:54,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:54,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:54,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:19:54,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:19:54,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:54,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:19:54,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320010105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:54,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:54,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2023-11-21 22:19:54,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97155672] [2023-11-21 22:19:54,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:54,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:19:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:19:54,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:19:54,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:19:54,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 358 flow. Second operand has 12 states, 12 states have (on average 20.166666666666668) internal successors, (242), 12 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:54,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:54,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:19:54,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:55,161 INFO L124 PetriNetUnfolderBase]: 418/760 cut-off events. [2023-11-21 22:19:55,161 INFO L125 PetriNetUnfolderBase]: For 1731/1735 co-relation queries the response was YES. [2023-11-21 22:19:55,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 760 events. 418/760 cut-off events. For 1731/1735 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3379 event pairs, 35 based on Foata normal form. 20/780 useless extension candidates. Maximal degree in co-relation 2816. Up to 349 conditions per place. [2023-11-21 22:19:55,172 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 70 selfloop transitions, 24 changer transitions 2/102 dead transitions. [2023-11-21 22:19:55,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 801 flow [2023-11-21 22:19:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:19:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:19:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2023-11-21 22:19:55,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493055555555556 [2023-11-21 22:19:55,174 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 187 transitions. [2023-11-21 22:19:55,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 187 transitions. [2023-11-21 22:19:55,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:55,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 187 transitions. [2023-11-21 22:19:55,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:55,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:55,179 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 36.0) internal successors, (324), 9 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:55,179 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 358 flow. Second operand 8 states and 187 transitions. [2023-11-21 22:19:55,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 801 flow [2023-11-21 22:19:55,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 781 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:55,192 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 483 flow [2023-11-21 22:19:55,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=483, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-11-21 22:19:55,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-11-21 22:19:55,195 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 483 flow [2023-11-21 22:19:55,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.166666666666668) internal successors, (242), 12 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:55,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:55,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:55,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:55,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:55,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:55,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 690562805, now seen corresponding path program 4 times [2023-11-21 22:19:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:55,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340435360] [2023-11-21 22:19:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:55,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:55,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340435360] [2023-11-21 22:19:55,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340435360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:55,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978972932] [2023-11-21 22:19:55,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:19:55,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:55,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:55,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:19:55,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:19:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:55,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:19:55,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:55,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:56,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978972932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:56,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:56,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-11-21 22:19:56,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840467998] [2023-11-21 22:19:56,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:56,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:19:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:56,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:19:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:19:56,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:19:56,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 483 flow. Second operand has 17 states, 17 states have (on average 19.647058823529413) internal successors, (334), 17 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:56,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:56,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:19:56,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:57,801 INFO L124 PetriNetUnfolderBase]: 770/1347 cut-off events. [2023-11-21 22:19:57,801 INFO L125 PetriNetUnfolderBase]: For 5126/5126 co-relation queries the response was YES. [2023-11-21 22:19:57,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 1347 events. 770/1347 cut-off events. For 5126/5126 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6415 event pairs, 4 based on Foata normal form. 33/1380 useless extension candidates. Maximal degree in co-relation 5863. Up to 268 conditions per place. [2023-11-21 22:19:57,818 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 125 selfloop transitions, 117 changer transitions 14/262 dead transitions. [2023-11-21 22:19:57,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 262 transitions, 2468 flow [2023-11-21 22:19:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-21 22:19:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-21 22:19:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 765 transitions. [2023-11-21 22:19:57,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-21 22:19:57,823 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 765 transitions. [2023-11-21 22:19:57,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 765 transitions. [2023-11-21 22:19:57,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:57,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 765 transitions. [2023-11-21 22:19:57,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 22.5) internal successors, (765), 34 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:57,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 36.0) internal successors, (1260), 35 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:57,831 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 36.0) internal successors, (1260), 35 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:57,832 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 483 flow. Second operand 34 states and 765 transitions. [2023-11-21 22:19:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 262 transitions, 2468 flow [2023-11-21 22:19:57,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 262 transitions, 2402 flow, removed 31 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:57,861 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1848 flow [2023-11-21 22:19:57,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1848, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2023-11-21 22:19:57,863 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2023-11-21 22:19:57,863 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1848 flow [2023-11-21 22:19:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.647058823529413) internal successors, (334), 17 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:57,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:57,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:57,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:19:58,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:19:58,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2010098869, now seen corresponding path program 5 times [2023-11-21 22:19:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60026752] [2023-11-21 22:19:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60026752] [2023-11-21 22:19:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60026752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783953353] [2023-11-21 22:19:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:19:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:58,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:58,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:19:58,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-21 22:19:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:58,445 WARN L260 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:19:58,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:58,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:59,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783953353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:59,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:59,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 19 [2023-11-21 22:19:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539551627] [2023-11-21 22:19:59,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:19:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:19:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:19:59,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:19:59,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1848 flow. Second operand has 19 states, 19 states have (on average 19.157894736842106) internal successors, (364), 19 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:59,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:59,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:19:59,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:02,076 INFO L124 PetriNetUnfolderBase]: 1178/2054 cut-off events. [2023-11-21 22:20:02,076 INFO L125 PetriNetUnfolderBase]: For 23249/23255 co-relation queries the response was YES. [2023-11-21 22:20:02,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2054 events. 1178/2054 cut-off events. For 23249/23255 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10767 event pairs, 20 based on Foata normal form. 60/2114 useless extension candidates. Maximal degree in co-relation 12533. Up to 419 conditions per place. [2023-11-21 22:20:02,111 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 156 selfloop transitions, 292 changer transitions 4/458 dead transitions. [2023-11-21 22:20:02,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 458 transitions, 6241 flow [2023-11-21 22:20:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-21 22:20:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-21 22:20:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 942 transitions. [2023-11-21 22:20:02,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2023-11-21 22:20:02,118 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 942 transitions. [2023-11-21 22:20:02,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 942 transitions. [2023-11-21 22:20:02,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:02,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 942 transitions. [2023-11-21 22:20:02,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 21.906976744186046) internal successors, (942), 43 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:02,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 36.0) internal successors, (1584), 44 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:02,131 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 36.0) internal successors, (1584), 44 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:02,131 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1848 flow. Second operand 43 states and 942 transitions. [2023-11-21 22:20:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 458 transitions, 6241 flow [2023-11-21 22:20:02,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 458 transitions, 5352 flow, removed 421 selfloop flow, removed 11 redundant places. [2023-11-21 22:20:02,335 INFO L231 Difference]: Finished difference. Result has 169 places, 354 transitions, 4692 flow [2023-11-21 22:20:02,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4692, PETRI_PLACES=169, PETRI_TRANSITIONS=354} [2023-11-21 22:20:02,336 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-11-21 22:20:02,336 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 354 transitions, 4692 flow [2023-11-21 22:20:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.157894736842106) internal successors, (364), 19 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:02,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:02,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:02,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:02,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:02,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -994227103, now seen corresponding path program 6 times [2023-11-21 22:20:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090972398] [2023-11-21 22:20:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:02,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090972398] [2023-11-21 22:20:02,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090972398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52749219] [2023-11-21 22:20:02,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:20:02,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:02,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:02,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:02,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:20:02,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-21 22:20:02,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:02,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:20:02,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:03,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:03,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52749219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:03,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:03,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2023-11-21 22:20:03,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124978085] [2023-11-21 22:20:03,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:03,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:20:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:20:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:20:03,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:20:03,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 354 transitions, 4692 flow. Second operand has 15 states, 15 states have (on average 19.933333333333334) internal successors, (299), 15 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:03,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:03,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:20:03,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:05,474 INFO L124 PetriNetUnfolderBase]: 1498/2579 cut-off events. [2023-11-21 22:20:05,475 INFO L125 PetriNetUnfolderBase]: For 28531/28537 co-relation queries the response was YES. [2023-11-21 22:20:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16491 conditions, 2579 events. 1498/2579 cut-off events. For 28531/28537 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13976 event pairs, 13 based on Foata normal form. 39/2618 useless extension candidates. Maximal degree in co-relation 16428. Up to 455 conditions per place. [2023-11-21 22:20:05,522 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 223 selfloop transitions, 411 changer transitions 2/642 dead transitions. [2023-11-21 22:20:05,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 642 transitions, 9061 flow [2023-11-21 22:20:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-21 22:20:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-21 22:20:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 860 transitions. [2023-11-21 22:20:05,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6286549707602339 [2023-11-21 22:20:05,528 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 860 transitions. [2023-11-21 22:20:05,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 860 transitions. [2023-11-21 22:20:05,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:05,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 860 transitions. [2023-11-21 22:20:05,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 22.63157894736842) internal successors, (860), 38 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:05,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:05,537 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:05,537 INFO L175 Difference]: Start difference. First operand has 169 places, 354 transitions, 4692 flow. Second operand 38 states and 860 transitions. [2023-11-21 22:20:05,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 642 transitions, 9061 flow [2023-11-21 22:20:05,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 642 transitions, 8324 flow, removed 339 selfloop flow, removed 6 redundant places. [2023-11-21 22:20:05,896 INFO L231 Difference]: Finished difference. Result has 222 places, 528 transitions, 7915 flow [2023-11-21 22:20:05,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7915, PETRI_PLACES=222, PETRI_TRANSITIONS=528} [2023-11-21 22:20:05,898 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 184 predicate places. [2023-11-21 22:20:05,898 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 528 transitions, 7915 flow [2023-11-21 22:20:05,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.933333333333334) internal successors, (299), 15 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:05,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:05,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:06,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:06,105 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:06,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1342787967, now seen corresponding path program 7 times [2023-11-21 22:20:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913494091] [2023-11-21 22:20:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913494091] [2023-11-21 22:20:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913494091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44847246] [2023-11-21 22:20:06,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:20:06,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:06,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:06,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:06,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:20:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:06,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:20:06,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:06,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44847246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:06,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:06,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-21 22:20:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391154394] [2023-11-21 22:20:06,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:06,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:20:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:20:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:20:06,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:20:06,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 528 transitions, 7915 flow. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:06,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:06,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:20:06,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:08,980 INFO L124 PetriNetUnfolderBase]: 1628/2967 cut-off events. [2023-11-21 22:20:08,980 INFO L125 PetriNetUnfolderBase]: For 32900/32933 co-relation queries the response was YES. [2023-11-21 22:20:09,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20394 conditions, 2967 events. 1628/2967 cut-off events. For 32900/32933 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17976 event pairs, 32 based on Foata normal form. 35/3002 useless extension candidates. Maximal degree in co-relation 20313. Up to 517 conditions per place. [2023-11-21 22:20:09,048 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 180 selfloop transitions, 505 changer transitions 1/741 dead transitions. [2023-11-21 22:20:09,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 741 transitions, 12116 flow [2023-11-21 22:20:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:20:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-21 22:20:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 708 transitions. [2023-11-21 22:20:09,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2023-11-21 22:20:09,051 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 708 transitions. [2023-11-21 22:20:09,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 708 transitions. [2023-11-21 22:20:09,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:09,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 708 transitions. [2023-11-21 22:20:09,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 23.6) internal successors, (708), 30 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,058 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,058 INFO L175 Difference]: Start difference. First operand has 222 places, 528 transitions, 7915 flow. Second operand 30 states and 708 transitions. [2023-11-21 22:20:09,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 741 transitions, 12116 flow [2023-11-21 22:20:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 741 transitions, 11432 flow, removed 342 selfloop flow, removed 0 redundant places. [2023-11-21 22:20:09,658 INFO L231 Difference]: Finished difference. Result has 264 places, 667 transitions, 11327 flow [2023-11-21 22:20:09,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11327, PETRI_PLACES=264, PETRI_TRANSITIONS=667} [2023-11-21 22:20:09,660 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 226 predicate places. [2023-11-21 22:20:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 667 transitions, 11327 flow [2023-11-21 22:20:09,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:09,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:09,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 22:20:09,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:20:09,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:09,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1301747213, now seen corresponding path program 8 times [2023-11-21 22:20:09,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:09,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122875947] [2023-11-21 22:20:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:09,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122875947] [2023-11-21 22:20:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122875947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696632843] [2023-11-21 22:20:10,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:20:10,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:10,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:10,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:20:10,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:20:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:10,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:20:10,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696632843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:10,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-21 22:20:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531908421] [2023-11-21 22:20:10,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:20:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:20:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:20:10,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:20:10,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 667 transitions, 11327 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:10,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:20:10,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:13,278 INFO L124 PetriNetUnfolderBase]: 2149/3938 cut-off events. [2023-11-21 22:20:13,278 INFO L125 PetriNetUnfolderBase]: For 49446/49485 co-relation queries the response was YES. [2023-11-21 22:20:13,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29472 conditions, 3938 events. 2149/3938 cut-off events. For 49446/49485 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25432 event pairs, 76 based on Foata normal form. 76/4014 useless extension candidates. Maximal degree in co-relation 29376. Up to 691 conditions per place. [2023-11-21 22:20:13,342 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 263 selfloop transitions, 631 changer transitions 1/950 dead transitions. [2023-11-21 22:20:13,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 950 transitions, 17520 flow [2023-11-21 22:20:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:20:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-21 22:20:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 573 transitions. [2023-11-21 22:20:13,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2023-11-21 22:20:13,346 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 573 transitions. [2023-11-21 22:20:13,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 573 transitions. [2023-11-21 22:20:13,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:13,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 573 transitions. [2023-11-21 22:20:13,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 23.875) internal successors, (573), 24 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 36.0) internal successors, (900), 25 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,352 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 36.0) internal successors, (900), 25 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:13,352 INFO L175 Difference]: Start difference. First operand has 264 places, 667 transitions, 11327 flow. Second operand 24 states and 573 transitions. [2023-11-21 22:20:13,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 950 transitions, 17520 flow [2023-11-21 22:20:14,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 950 transitions, 17315 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-11-21 22:20:14,476 INFO L231 Difference]: Finished difference. Result has 297 places, 867 transitions, 17372 flow [2023-11-21 22:20:14,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11158, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=17372, PETRI_PLACES=297, PETRI_TRANSITIONS=867} [2023-11-21 22:20:14,478 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 259 predicate places. [2023-11-21 22:20:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 867 transitions, 17372 flow [2023-11-21 22:20:14,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:14,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:14,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:14,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:14,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:20:14,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:14,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash -809057443, now seen corresponding path program 9 times [2023-11-21 22:20:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:14,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651334248] [2023-11-21 22:20:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:14,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651334248] [2023-11-21 22:20:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651334248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679456646] [2023-11-21 22:20:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:20:15,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:15,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:15,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:20:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 22:20:15,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:15,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:20:15,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:15,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:15,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679456646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:15,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:15,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2023-11-21 22:20:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046956597] [2023-11-21 22:20:15,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:15,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:20:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:20:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:20:15,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-21 22:20:15,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 867 transitions, 17372 flow. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:15,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:15,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-21 22:20:15,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:20,507 INFO L124 PetriNetUnfolderBase]: 3767/6626 cut-off events. [2023-11-21 22:20:20,507 INFO L125 PetriNetUnfolderBase]: For 106551/106564 co-relation queries the response was YES. [2023-11-21 22:20:20,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57320 conditions, 6626 events. 3767/6626 cut-off events. For 106551/106564 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44562 event pairs, 29 based on Foata normal form. 128/6754 useless extension candidates. Maximal degree in co-relation 57212. Up to 1194 conditions per place. [2023-11-21 22:20:20,620 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 517 selfloop transitions, 1182 changer transitions 16/1721 dead transitions. [2023-11-21 22:20:20,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1721 transitions, 37640 flow [2023-11-21 22:20:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-21 22:20:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-21 22:20:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1023 transitions. [2023-11-21 22:20:20,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314814814814815 [2023-11-21 22:20:20,624 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 1023 transitions. [2023-11-21 22:20:20,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 1023 transitions. [2023-11-21 22:20:20,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:20,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 1023 transitions. [2023-11-21 22:20:20,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 22.733333333333334) internal successors, (1023), 45 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:20,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 36.0) internal successors, (1656), 46 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:20,632 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 36.0) internal successors, (1656), 46 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:20,632 INFO L175 Difference]: Start difference. First operand has 297 places, 867 transitions, 17372 flow. Second operand 45 states and 1023 transitions. [2023-11-21 22:20:20,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1721 transitions, 37640 flow [2023-11-21 22:20:23,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1721 transitions, 37275 flow, removed 106 selfloop flow, removed 10 redundant places. [2023-11-21 22:20:23,911 INFO L231 Difference]: Finished difference. Result has 364 places, 1525 transitions, 36363 flow [2023-11-21 22:20:23,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=17003, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=36363, PETRI_PLACES=364, PETRI_TRANSITIONS=1525} [2023-11-21 22:20:23,913 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 326 predicate places. [2023-11-21 22:20:23,913 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1525 transitions, 36363 flow [2023-11-21 22:20:23,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:23,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:23,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:23,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-21 22:20:24,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:20:24,128 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:24,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash 156869685, now seen corresponding path program 10 times [2023-11-21 22:20:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290433537] [2023-11-21 22:20:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:24,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:24,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290433537] [2023-11-21 22:20:24,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290433537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:24,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145817052] [2023-11-21 22:20:24,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:20:24,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:24,393 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:24,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:20:24,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:20:24,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:24,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:20:24,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:24,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:24,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145817052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:24,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:24,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-21 22:20:24,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696770228] [2023-11-21 22:20:24,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:24,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:20:24,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:24,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:20:24,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:20:24,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-21 22:20:24,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1525 transitions, 36363 flow. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:24,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:24,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-21 22:20:24,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:30,023 INFO L124 PetriNetUnfolderBase]: 4015/7224 cut-off events. [2023-11-21 22:20:30,023 INFO L125 PetriNetUnfolderBase]: For 178149/178162 co-relation queries the response was YES. [2023-11-21 22:20:30,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73244 conditions, 7224 events. 4015/7224 cut-off events. For 178149/178162 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 51533 event pairs, 425 based on Foata normal form. 25/7249 useless extension candidates. Maximal degree in co-relation 73105. Up to 2517 conditions per place. [2023-11-21 22:20:30,558 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 526 selfloop transitions, 1177 changer transitions 6/1824 dead transitions. [2023-11-21 22:20:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1824 transitions, 46952 flow [2023-11-21 22:20:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:20:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-21 22:20:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 417 transitions. [2023-11-21 22:20:30,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2023-11-21 22:20:30,561 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 417 transitions. [2023-11-21 22:20:30,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 417 transitions. [2023-11-21 22:20:30,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:30,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 417 transitions. [2023-11-21 22:20:30,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.166666666666668) internal successors, (417), 18 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,565 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:30,565 INFO L175 Difference]: Start difference. First operand has 364 places, 1525 transitions, 36363 flow. Second operand 18 states and 417 transitions. [2023-11-21 22:20:30,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1824 transitions, 46952 flow [2023-11-21 22:20:36,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1824 transitions, 46407 flow, removed 199 selfloop flow, removed 5 redundant places. [2023-11-21 22:20:36,769 INFO L231 Difference]: Finished difference. Result has 383 places, 1790 transitions, 47675 flow [2023-11-21 22:20:36,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=35889, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=911, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=47675, PETRI_PLACES=383, PETRI_TRANSITIONS=1790} [2023-11-21 22:20:36,771 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 345 predicate places. [2023-11-21 22:20:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1790 transitions, 47675 flow [2023-11-21 22:20:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:36,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:36,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:36,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:36,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:36,972 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 22:20:36,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1648334241, now seen corresponding path program 11 times [2023-11-21 22:20:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999882256] [2023-11-21 22:20:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999882256] [2023-11-21 22:20:37,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999882256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208721239] [2023-11-21 22:20:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:20:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:37,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:37,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_065a444c-4d8e-429c-aafd-df037f08f1d3/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:20:37,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-21 22:20:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:37,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:20:37,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:37,410 INFO L327 TraceCheckSpWp]: Computing backward predicates...