./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya --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 c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:45:45,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:45:45,572 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 23:45:45,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:45:45,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:45:45,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:45:45,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:45:45,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:45:45,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:45:45,602 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:45:45,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:45:45,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:45:45,603 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:45:45,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:45:45,604 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:45:45,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:45:45,605 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:45:45,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:45:45,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:45:45,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:45:45,607 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 23:45:45,608 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 23:45:45,609 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 23:45:45,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:45:45,610 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 23:45:45,610 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:45:45,611 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:45:45,611 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:45:45,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:45:45,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:45:45,612 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:45:45,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:45:45,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:45:45,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:45:45,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:45:45,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:45:45,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:45:45,614 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:45:45,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:45:45,614 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:45:45,614 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:45:45,615 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_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2023-11-28 23:45:45,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:45:45,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:45:45,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:45:45,868 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:45:45,868 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:45:45,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-28 23:45:48,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:45:48,841 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:45:48,842 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-28 23:45:48,856 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/data/10a9c9324/dc7f26bcbca443efb96b79f643d48976/FLAG9b42276cc [2023-11-28 23:45:48,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/data/10a9c9324/dc7f26bcbca443efb96b79f643d48976 [2023-11-28 23:45:48,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:45:48,870 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:45:48,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:45:48,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:45:48,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:45:48,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:45:48" (1/1) ... [2023-11-28 23:45:48,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26704aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:48, skipping insertion in model container [2023-11-28 23:45:48,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:45:48" (1/1) ... [2023-11-28 23:45:48,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:45:49,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:45:49,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:45:49,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:45:49,260 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:45:49,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49 WrapperNode [2023-11-28 23:45:49,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:45:49,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:45:49,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:45:49,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:45:49,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,300 INFO L138 Inliner]: procedures = 170, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 63 [2023-11-28 23:45:49,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:45:49,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:45:49,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:45:49,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:45:49,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,314 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,329 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-28 23:45:49,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:45:49,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:45:49,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:45:49,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:45:49,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (1/1) ... [2023-11-28 23:45:49,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:45:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:45:49,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:45:49,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321a8be-4228-46a8-91ac-1ed18bdfc336/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:45:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-28 23:45:49,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-28 23:45:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:45:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:45:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:45:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:45:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:45:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:45:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:45:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:45:49,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:45:49,418 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:45:49,559 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:45:49,561 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:45:49,700 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:45:49,794 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:45:49,794 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:45:49,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:45:49 BoogieIcfgContainer [2023-11-28 23:45:49,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:45:49,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:45:49,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:45:49,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:45:49,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:45:48" (1/3) ... [2023-11-28 23:45:49,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2462ecfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:45:49, skipping insertion in model container [2023-11-28 23:45:49,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:49" (2/3) ... [2023-11-28 23:45:49,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2462ecfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:45:49, skipping insertion in model container [2023-11-28 23:45:49,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:45:49" (3/3) ... [2023-11-28 23:45:49,802 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-11-28 23:45:49,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:45:49,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-28 23:45:49,818 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:45:49,850 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 28 transitions, 60 flow [2023-11-28 23:45:49,918 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-28 23:45:49,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:49,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 35 events. 4/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 74 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 3 conditions per place. [2023-11-28 23:45:49,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 28 transitions, 60 flow [2023-11-28 23:45:49,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 28 transitions, 60 flow [2023-11-28 23:45:49,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:49,948 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;@6f3949f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:49,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-28 23:45:49,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:49,952 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:45:49,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:49,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:49,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:49,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:45:49,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash 223597, now seen corresponding path program 1 times [2023-11-28 23:45:49,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:49,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416425276] [2023-11-28 23:45:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:49,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416425276] [2023-11-28 23:45:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416425276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:50,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:50,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:50,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682948489] [2023-11-28 23:45:50,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:50,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:50,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 28 [2023-11-28 23:45:50,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:50,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 28 [2023-11-28 23:45:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:50,337 INFO L124 PetriNetUnfolderBase]: 23/81 cut-off events. [2023-11-28 23:45:50,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:50,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 81 events. 23/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 238 event pairs, 15 based on Foata normal form. 8/77 useless extension candidates. Maximal degree in co-relation 113. Up to 42 conditions per place. [2023-11-28 23:45:50,341 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 9 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-28 23:45:50,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 66 flow [2023-11-28 23:45:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-28 23:45:50,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-11-28 23:45:50,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-28 23:45:50,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-28 23:45:50,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:50,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-28 23:45:50,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-28 23:45:50,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,370 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 60 flow. Second operand 3 states and 50 transitions. [2023-11-28 23:45:50,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 66 flow [2023-11-28 23:45:50,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:45:50,376 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 48 flow [2023-11-28 23:45:50,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2023-11-28 23:45:50,383 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2023-11-28 23:45:50,383 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 48 flow [2023-11-28 23:45:50,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:45:50,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:45:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 223598, now seen corresponding path program 1 times [2023-11-28 23:45:50,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712133720] [2023-11-28 23:45:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:50,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712133720] [2023-11-28 23:45:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712133720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:50,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144380193] [2023-11-28 23:45:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:50,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 28 [2023-11-28 23:45:50,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:50,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 28 [2023-11-28 23:45:50,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:50,566 INFO L124 PetriNetUnfolderBase]: 23/79 cut-off events. [2023-11-28 23:45:50,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:50,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 79 events. 23/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 231 event pairs, 15 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 121. Up to 42 conditions per place. [2023-11-28 23:45:50,568 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 9 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-28 23:45:50,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 20 transitions, 66 flow [2023-11-28 23:45:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-28 23:45:50,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-28 23:45:50,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-28 23:45:50,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-28 23:45:50,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:50,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-28 23:45:50,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,574 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 48 flow. Second operand 3 states and 47 transitions. [2023-11-28 23:45:50,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 20 transitions, 66 flow [2023-11-28 23:45:50,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:50,576 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 47 flow [2023-11-28 23:45:50,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-28 23:45:50,578 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2023-11-28 23:45:50,578 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 47 flow [2023-11-28 23:45:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:50,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-28 23:45:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:45:50,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:45:50,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2073286630, now seen corresponding path program 1 times [2023-11-28 23:45:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:50,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853183957] [2023-11-28 23:45:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:50,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:50,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:50,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:50,637 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-28 23:45:50,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-28 23:45:50,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-28 23:45:50,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-28 23:45:50,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-28 23:45:50,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-28 23:45:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:45:50,640 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-28 23:45:50,644 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:50,644 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-28 23:45:50,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:50,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 46 transitions, 102 flow [2023-11-28 23:45:50,683 INFO L124 PetriNetUnfolderBase]: 8/61 cut-off events. [2023-11-28 23:45:50,683 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 23:45:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 61 events. 8/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 159 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 42. Up to 3 conditions per place. [2023-11-28 23:45:50,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 46 transitions, 102 flow [2023-11-28 23:45:50,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 46 transitions, 102 flow [2023-11-28 23:45:50,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:50,688 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;@6f3949f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:50,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-28 23:45:50,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:50,690 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:45:50,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:50,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:50,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:50,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:45:50,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 269275, now seen corresponding path program 1 times [2023-11-28 23:45:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:50,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152772093] [2023-11-28 23:45:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152772093] [2023-11-28 23:45:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152772093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178521126] [2023-11-28 23:45:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:50,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-28 23:45:50,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 102 flow. Second operand has 3 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) [2023-11-28 23:45:50,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:50,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-28 23:45:50,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:50,864 INFO L124 PetriNetUnfolderBase]: 273/625 cut-off events. [2023-11-28 23:45:50,864 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-28 23:45:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 625 events. 273/625 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3271 event pairs, 225 based on Foata normal form. 80/626 useless extension candidates. Maximal degree in co-relation 237. Up to 396 conditions per place. [2023-11-28 23:45:50,874 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 15 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-11-28 23:45:50,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 114 flow [2023-11-28 23:45:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-28 23:45:50,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2023-11-28 23:45:50,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-28 23:45:50,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-28 23:45:50,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:50,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-28 23:45:50,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:50,880 INFO L175 Difference]: Start difference. First operand has 43 places, 46 transitions, 102 flow. Second operand 3 states and 85 transitions. [2023-11-28 23:45:50,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 114 flow [2023-11-28 23:45:50,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:45:50,883 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 84 flow [2023-11-28 23:45:50,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-28 23:45:50,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-11-28 23:45:50,884 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 84 flow [2023-11-28 23:45:50,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-28 23:45:50,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:50,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:45:50,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:45:50,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 269276, now seen corresponding path program 1 times [2023-11-28 23:45:50,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:50,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143644428] [2023-11-28 23:45:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:50,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:50,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143644428] [2023-11-28 23:45:50,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143644428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:50,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:50,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114210410] [2023-11-28 23:45:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:50,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2023-11-28 23:45:50,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 84 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) [2023-11-28 23:45:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:50,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2023-11-28 23:45:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:51,022 INFO L124 PetriNetUnfolderBase]: 202/484 cut-off events. [2023-11-28 23:45:51,022 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-28 23:45:51,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 484 events. 202/484 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2427 event pairs, 160 based on Foata normal form. 43/458 useless extension candidates. Maximal degree in co-relation 790. Up to 288 conditions per place. [2023-11-28 23:45:51,026 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 14 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-28 23:45:51,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 112 flow [2023-11-28 23:45:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-28 23:45:51,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2023-11-28 23:45:51,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-28 23:45:51,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-28 23:45:51,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:51,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-28 23:45:51,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,031 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 84 flow. Second operand 3 states and 82 transitions. [2023-11-28 23:45:51,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 112 flow [2023-11-28 23:45:51,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:51,033 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 83 flow [2023-11-28 23:45:51,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-28 23:45:51,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-11-28 23:45:51,034 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 83 flow [2023-11-28 23:45:51,035 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) [2023-11-28 23:45:51,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:51,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-28 23:45:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:45:51,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:45:51,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1608384783, now seen corresponding path program 1 times [2023-11-28 23:45:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:51,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819764867] [2023-11-28 23:45:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:51,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:51,065 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:51,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:51,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-28 23:45:51,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-28 23:45:51,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-28 23:45:51,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-28 23:45:51,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-28 23:45:51,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-28 23:45:51,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-28 23:45:51,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:45:51,068 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-28 23:45:51,069 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:51,069 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-28 23:45:51,093 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:51,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 64 transitions, 146 flow [2023-11-28 23:45:51,103 INFO L124 PetriNetUnfolderBase]: 12/87 cut-off events. [2023-11-28 23:45:51,103 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-28 23:45:51,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 87 events. 12/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 270 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-28 23:45:51,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 64 transitions, 146 flow [2023-11-28 23:45:51,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 64 transitions, 146 flow [2023-11-28 23:45:51,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:51,107 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;@6f3949f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:51,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-28 23:45:51,109 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:51,109 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:45:51,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:51,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:51,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:51,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:45:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 332827, now seen corresponding path program 1 times [2023-11-28 23:45:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621407053] [2023-11-28 23:45:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621407053] [2023-11-28 23:45:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621407053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:51,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:51,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234397511] [2023-11-28 23:45:51,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:51,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:51,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 64 [2023-11-28 23:45:51,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:51,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 64 [2023-11-28 23:45:51,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:51,687 INFO L124 PetriNetUnfolderBase]: 2493/4604 cut-off events. [2023-11-28 23:45:51,687 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-11-28 23:45:51,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8013 conditions, 4604 events. 2493/4604 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31183 event pairs, 2205 based on Foata normal form. 807/4932 useless extension candidates. Maximal degree in co-relation 1047. Up to 3240 conditions per place. [2023-11-28 23:45:51,719 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 21 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-28 23:45:51,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 164 flow [2023-11-28 23:45:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-28 23:45:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-28 23:45:51,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-28 23:45:51,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-28 23:45:51,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:51,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-28 23:45:51,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2023-11-28 23:45:51,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,724 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 146 flow. Second operand 3 states and 120 transitions. [2023-11-28 23:45:51,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 164 flow [2023-11-28 23:45:51,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 162 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-28 23:45:51,727 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 120 flow [2023-11-28 23:45:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-11-28 23:45:51,728 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-11-28 23:45:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 120 flow [2023-11-28 23:45:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:51,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:45:51,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:45:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash 332828, now seen corresponding path program 1 times [2023-11-28 23:45:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154065163] [2023-11-28 23:45:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:51,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:51,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154065163] [2023-11-28 23:45:51,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154065163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:51,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:51,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:51,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731449576] [2023-11-28 23:45:51,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:51,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:51,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:51,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 64 [2023-11-28 23:45:51,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:51,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:51,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 64 [2023-11-28 23:45:51,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:52,271 INFO L124 PetriNetUnfolderBase]: 2493/4566 cut-off events. [2023-11-28 23:45:52,272 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-11-28 23:45:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7941 conditions, 4566 events. 2493/4566 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30737 event pairs, 2205 based on Foata normal form. 0/4087 useless extension candidates. Maximal degree in co-relation 7932. Up to 3240 conditions per place. [2023-11-28 23:45:52,306 INFO L140 encePairwiseOnDemand]: 62/64 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-28 23:45:52,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 162 flow [2023-11-28 23:45:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-28 23:45:52,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2023-11-28 23:45:52,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-28 23:45:52,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-28 23:45:52,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:52,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-28 23:45:52,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:52,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:52,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:52,311 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 120 flow. Second operand 3 states and 113 transitions. [2023-11-28 23:45:52,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 162 flow [2023-11-28 23:45:52,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:52,314 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 119 flow [2023-11-28 23:45:52,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-28 23:45:52,314 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-11-28 23:45:52,315 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 119 flow [2023-11-28 23:45:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:52,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:52,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:52,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:45:52,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:45:52,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -239743427, now seen corresponding path program 1 times [2023-11-28 23:45:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:52,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989743863] [2023-11-28 23:45:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:52,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:52,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:52,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989743863] [2023-11-28 23:45:52,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989743863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:52,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:45:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011881254] [2023-11-28 23:45:52,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:45:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:45:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:45:52,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 64 [2023-11-28 23:45:52,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:52,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 64 [2023-11-28 23:45:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:53,001 INFO L124 PetriNetUnfolderBase]: 3454/5970 cut-off events. [2023-11-28 23:45:53,001 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2023-11-28 23:45:53,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11110 conditions, 5970 events. 3454/5970 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40862 event pairs, 736 based on Foata normal form. 0/5628 useless extension candidates. Maximal degree in co-relation 11100. Up to 2085 conditions per place. [2023-11-28 23:45:53,037 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 52 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-11-28 23:45:53,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 307 flow [2023-11-28 23:45:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:45:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:45:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2023-11-28 23:45:53,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2023-11-28 23:45:53,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 164 transitions. [2023-11-28 23:45:53,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 164 transitions. [2023-11-28 23:45:53,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:53,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 164 transitions. [2023-11-28 23:45:53,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,042 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 119 flow. Second operand 4 states and 164 transitions. [2023-11-28 23:45:53,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 307 flow [2023-11-28 23:45:53,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:53,045 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 122 flow [2023-11-28 23:45:53,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-28 23:45:53,046 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-11-28 23:45:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 122 flow [2023-11-28 23:45:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:53,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:45:53,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:45:53,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -238760324, now seen corresponding path program 1 times [2023-11-28 23:45:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:53,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672323751] [2023-11-28 23:45:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:53,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672323751] [2023-11-28 23:45:53,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672323751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:53,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:53,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:45:53,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934849672] [2023-11-28 23:45:53,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:53,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:45:53,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:45:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:45:53,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2023-11-28 23:45:53,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:53,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2023-11-28 23:45:53,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:53,652 INFO L124 PetriNetUnfolderBase]: 3454/5454 cut-off events. [2023-11-28 23:45:53,653 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2023-11-28 23:45:53,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10852 conditions, 5454 events. 3454/5454 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33067 event pairs, 736 based on Foata normal form. 129/5349 useless extension candidates. Maximal degree in co-relation 10842. Up to 2085 conditions per place. [2023-11-28 23:45:53,698 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 53 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-28 23:45:53,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 302 flow [2023-11-28 23:45:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:45:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:45:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2023-11-28 23:45:53,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-28 23:45:53,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2023-11-28 23:45:53,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2023-11-28 23:45:53,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:53,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2023-11-28 23:45:53,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,703 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 122 flow. Second operand 4 states and 160 transitions. [2023-11-28 23:45:53,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 302 flow [2023-11-28 23:45:53,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:45:53,706 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 113 flow [2023-11-28 23:45:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-28 23:45:53,707 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-11-28 23:45:53,707 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 113 flow [2023-11-28 23:45:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-28 23:45:53,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:45:53,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:45:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash -539411237, now seen corresponding path program 1 times [2023-11-28 23:45:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681349295] [2023-11-28 23:45:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:53,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:53,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:53,738 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:53,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-28 23:45:53,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-28 23:45:53,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-28 23:45:53,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:45:53,740 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-28 23:45:53,740 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:53,740 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-28 23:45:53,770 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:53,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 82 transitions, 192 flow [2023-11-28 23:45:53,782 INFO L124 PetriNetUnfolderBase]: 16/113 cut-off events. [2023-11-28 23:45:53,782 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-28 23:45:53,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 113 events. 16/113 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 99. Up to 5 conditions per place. [2023-11-28 23:45:53,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 82 transitions, 192 flow [2023-11-28 23:45:53,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 82 transitions, 192 flow [2023-11-28 23:45:53,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:53,786 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;@6f3949f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:53,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-28 23:45:53,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:53,788 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:45:53,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:53,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:53,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:45:53,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 414253, now seen corresponding path program 1 times [2023-11-28 23:45:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:53,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85826656] [2023-11-28 23:45:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:53,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:53,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85826656] [2023-11-28 23:45:53,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85826656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:53,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:53,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329722189] [2023-11-28 23:45:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:53,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2023-11-28 23:45:53,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2023-11-28 23:45:53,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:53,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2023-11-28 23:45:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:56,442 INFO L124 PetriNetUnfolderBase]: 20133/32797 cut-off events. [2023-11-28 23:45:56,442 INFO L125 PetriNetUnfolderBase]: For 3337/3337 co-relation queries the response was YES. [2023-11-28 23:45:56,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58671 conditions, 32797 events. 20133/32797 cut-off events. For 3337/3337 co-relation queries the response was YES. Maximal size of possible extension queue 1298. Compared 258224 event pairs, 18405 based on Foata normal form. 6897/36815 useless extension candidates. Maximal degree in co-relation 8050. Up to 24624 conditions per place. [2023-11-28 23:45:56,778 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 27 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-28 23:45:56,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 216 flow [2023-11-28 23:45:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-28 23:45:56,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2023-11-28 23:45:56,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-28 23:45:56,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-28 23:45:56,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:56,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-28 23:45:56,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:56,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:56,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:56,782 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 192 flow. Second operand 3 states and 155 transitions. [2023-11-28 23:45:56,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 216 flow [2023-11-28 23:45:56,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-28 23:45:56,785 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 156 flow [2023-11-28 23:45:56,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-11-28 23:45:56,786 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-11-28 23:45:56,786 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 156 flow [2023-11-28 23:45:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2023-11-28 23:45:56,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:56,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:45:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 23:45:56,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:45:56,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 414254, now seen corresponding path program 1 times [2023-11-28 23:45:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899005783] [2023-11-28 23:45:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899005783] [2023-11-28 23:45:56,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899005783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:56,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:56,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:45:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677288053] [2023-11-28 23:45:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:56,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:56,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:56,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 82 [2023-11-28 23:45:56,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:56,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:56,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 82 [2023-11-28 23:45:56,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:58,458 INFO L124 PetriNetUnfolderBase]: 15034/25143 cut-off events. [2023-11-28 23:45:58,458 INFO L125 PetriNetUnfolderBase]: For 781/781 co-relation queries the response was YES. [2023-11-28 23:45:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44071 conditions, 25143 events. 15034/25143 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 196367 event pairs, 13480 based on Foata normal form. 1555/24034 useless extension candidates. Maximal degree in co-relation 44061. Up to 18144 conditions per place. [2023-11-28 23:45:58,619 INFO L140 encePairwiseOnDemand]: 80/82 looper letters, 26 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-28 23:45:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 208 flow [2023-11-28 23:45:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-28 23:45:58,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2023-11-28 23:45:58,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-28 23:45:58,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-28 23:45:58,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:58,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-28 23:45:58,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:58,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:58,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:58,623 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 156 flow. Second operand 3 states and 148 transitions. [2023-11-28 23:45:58,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 208 flow [2023-11-28 23:45:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:58,625 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 155 flow [2023-11-28 23:45:58,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-28 23:45:58,626 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-11-28 23:45:58,626 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 155 flow [2023-11-28 23:45:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:58,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:58,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 23:45:58,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:45:58,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -7744690, now seen corresponding path program 1 times [2023-11-28 23:45:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:58,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567504539] [2023-11-28 23:45:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567504539] [2023-11-28 23:45:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567504539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:58,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:58,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:45:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680665785] [2023-11-28 23:45:58,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:45:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:45:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:45:58,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-28 23:45:58,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:58,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:58,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-28 23:45:58,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:01,819 INFO L124 PetriNetUnfolderBase]: 28510/43659 cut-off events. [2023-11-28 23:46:01,819 INFO L125 PetriNetUnfolderBase]: For 1555/1555 co-relation queries the response was YES. [2023-11-28 23:46:01,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82280 conditions, 43659 events. 28510/43659 cut-off events. For 1555/1555 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 335930 event pairs, 6352 based on Foata normal form. 0/41520 useless extension candidates. Maximal degree in co-relation 82269. Up to 15765 conditions per place. [2023-11-28 23:46:02,219 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 70 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-11-28 23:46:02,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 413 flow [2023-11-28 23:46:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:46:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 218 transitions. [2023-11-28 23:46:02,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2023-11-28 23:46:02,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 218 transitions. [2023-11-28 23:46:02,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 218 transitions. [2023-11-28 23:46:02,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:02,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 218 transitions. [2023-11-28 23:46:02,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:02,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:02,224 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:02,224 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 155 flow. Second operand 4 states and 218 transitions. [2023-11-28 23:46:02,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 413 flow [2023-11-28 23:46:02,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:46:02,228 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 158 flow [2023-11-28 23:46:02,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-28 23:46:02,228 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-11-28 23:46:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 158 flow [2023-11-28 23:46:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:02,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:02,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 23:46:02,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:46:02,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash -6761587, now seen corresponding path program 1 times [2023-11-28 23:46:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:02,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849985835] [2023-11-28 23:46:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849985835] [2023-11-28 23:46:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849985835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:02,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:02,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902234037] [2023-11-28 23:46:02,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:02,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:02,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:02,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2023-11-28 23:46:02,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:02,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:02,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2023-11-28 23:46:02,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:05,793 INFO L124 PetriNetUnfolderBase]: 28510/40551 cut-off events. [2023-11-28 23:46:05,793 INFO L125 PetriNetUnfolderBase]: For 2320/2320 co-relation queries the response was YES. [2023-11-28 23:46:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80726 conditions, 40551 events. 28510/40551 cut-off events. For 2320/2320 co-relation queries the response was YES. Maximal size of possible extension queue 1475. Compared 274130 event pairs, 6352 based on Foata normal form. 777/39837 useless extension candidates. Maximal degree in co-relation 80715. Up to 15765 conditions per place. [2023-11-28 23:46:06,042 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 71 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-11-28 23:46:06,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 102 transitions, 408 flow [2023-11-28 23:46:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:46:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2023-11-28 23:46:06,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2023-11-28 23:46:06,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2023-11-28 23:46:06,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2023-11-28 23:46:06,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:06,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2023-11-28 23:46:06,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:06,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:06,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:06,047 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 158 flow. Second operand 4 states and 214 transitions. [2023-11-28 23:46:06,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 102 transitions, 408 flow [2023-11-28 23:46:06,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:46:06,053 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 149 flow [2023-11-28 23:46:06,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-28 23:46:06,054 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2023-11-28 23:46:06,054 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 149 flow [2023-11-28 23:46:06,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:06,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:06,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 23:46:06,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:46:06,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -534190985, now seen corresponding path program 1 times [2023-11-28 23:46:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720163048] [2023-11-28 23:46:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:06,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:46:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720163048] [2023-11-28 23:46:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720163048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:06,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:06,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068976151] [2023-11-28 23:46:06,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:06,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:06,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2023-11-28 23:46:06,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:06,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:06,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2023-11-28 23:46:06,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:09,963 INFO L124 PetriNetUnfolderBase]: 38482/58602 cut-off events. [2023-11-28 23:46:09,963 INFO L125 PetriNetUnfolderBase]: For 3586/3586 co-relation queries the response was YES. [2023-11-28 23:46:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112112 conditions, 58602 events. 38482/58602 cut-off events. For 3586/3586 co-relation queries the response was YES. Maximal size of possible extension queue 2402. Compared 466630 event pairs, 8611 based on Foata normal form. 0/54309 useless extension candidates. Maximal degree in co-relation 112101. Up to 21195 conditions per place. [2023-11-28 23:46:10,335 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 68 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-11-28 23:46:10,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 393 flow [2023-11-28 23:46:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:46:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2023-11-28 23:46:10,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2023-11-28 23:46:10,337 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 216 transitions. [2023-11-28 23:46:10,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 216 transitions. [2023-11-28 23:46:10,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:10,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 216 transitions. [2023-11-28 23:46:10,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 54.0) internal successors, (216), 4 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) [2023-11-28 23:46:10,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:10,339 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:10,339 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 149 flow. Second operand 4 states and 216 transitions. [2023-11-28 23:46:10,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 393 flow [2023-11-28 23:46:10,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:46:10,346 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 150 flow [2023-11-28 23:46:10,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-11-28 23:46:10,347 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-11-28 23:46:10,347 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 150 flow [2023-11-28 23:46:10,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:10,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:10,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:10,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:46:10,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:46:10,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash -533207882, now seen corresponding path program 1 times [2023-11-28 23:46:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127673727] [2023-11-28 23:46:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:46:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:10,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127673727] [2023-11-28 23:46:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127673727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:10,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:10,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064418331] [2023-11-28 23:46:10,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:10,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:10,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:10,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2023-11-28 23:46:10,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:10,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:10,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2023-11-28 23:46:10,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:14,177 INFO L124 PetriNetUnfolderBase]: 38482/54474 cut-off events. [2023-11-28 23:46:14,177 INFO L125 PetriNetUnfolderBase]: For 3025/3025 co-relation queries the response was YES. [2023-11-28 23:46:14,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108497 conditions, 54474 events. 38482/54474 cut-off events. For 3025/3025 co-relation queries the response was YES. Maximal size of possible extension queue 2111. Compared 381357 event pairs, 8611 based on Foata normal form. 1032/52065 useless extension candidates. Maximal degree in co-relation 108486. Up to 21195 conditions per place. [2023-11-28 23:46:14,579 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 69 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-28 23:46:14,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 382 flow [2023-11-28 23:46:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:46:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2023-11-28 23:46:14,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2023-11-28 23:46:14,581 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 212 transitions. [2023-11-28 23:46:14,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 212 transitions. [2023-11-28 23:46:14,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:14,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 212 transitions. [2023-11-28 23:46:14,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:14,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:14,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:14,584 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 150 flow. Second operand 4 states and 212 transitions. [2023-11-28 23:46:14,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 382 flow [2023-11-28 23:46:14,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:46:14,605 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 141 flow [2023-11-28 23:46:14,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-28 23:46:14,606 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2023-11-28 23:46:14,606 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 141 flow [2023-11-28 23:46:14,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:14,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:14,606 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 23:46:14,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:46:14,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 113733322, now seen corresponding path program 1 times [2023-11-28 23:46:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755291792] [2023-11-28 23:46:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:46:14,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:46:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:46:14,644 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:46:14,645 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:46:14,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-28 23:46:14,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-28 23:46:14,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-28 23:46:14,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-28 23:46:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 23:46:14,647 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:14,648 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:46:14,648 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-28 23:46:14,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:46:14,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 100 transitions, 240 flow [2023-11-28 23:46:14,708 INFO L124 PetriNetUnfolderBase]: 20/139 cut-off events. [2023-11-28 23:46:14,708 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-28 23:46:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 139 events. 20/139 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 443 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2023-11-28 23:46:14,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 100 transitions, 240 flow [2023-11-28 23:46:14,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 100 transitions, 240 flow [2023-11-28 23:46:14,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:46:14,714 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;@6f3949f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:46:14,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-28 23:46:14,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:46:14,715 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:46:14,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:46:14,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:14,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:46:14,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:46:14,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash 513553, now seen corresponding path program 1 times [2023-11-28 23:46:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595510721] [2023-11-28 23:46:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595510721] [2023-11-28 23:46:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595510721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:14,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:14,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:46:14,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803910089] [2023-11-28 23:46:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:14,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:14,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:14,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-11-28 23:46:14,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:14,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:14,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-11-28 23:46:14,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:33,142 INFO L124 PetriNetUnfolderBase]: 151893/227881 cut-off events. [2023-11-28 23:46:33,142 INFO L125 PetriNetUnfolderBase]: For 31597/31597 co-relation queries the response was YES. [2023-11-28 23:46:34,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415756 conditions, 227881 events. 151893/227881 cut-off events. For 31597/31597 co-relation queries the response was YES. Maximal size of possible extension queue 7684. Compared 1978489 event pairs, 141525 based on Foata normal form. 53805/264407 useless extension candidates. Maximal degree in co-relation 58924. Up to 178848 conditions per place. [2023-11-28 23:46:35,163 INFO L140 encePairwiseOnDemand]: 87/100 looper letters, 33 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-28 23:46:35,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 270 flow [2023-11-28 23:46:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:46:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-28 23:46:35,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-28 23:46:35,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-28 23:46:35,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-28 23:46:35,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:35,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-28 23:46:35,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:35,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:35,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:35,167 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 240 flow. Second operand 3 states and 190 transitions. [2023-11-28 23:46:35,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 270 flow [2023-11-28 23:46:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 258 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-28 23:46:35,185 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 192 flow [2023-11-28 23:46:35,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2023-11-28 23:46:35,185 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -7 predicate places. [2023-11-28 23:46:35,185 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 192 flow [2023-11-28 23:46:35,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:35,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:35,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:46:35,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 23:46:35,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:46:35,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash 513554, now seen corresponding path program 1 times [2023-11-28 23:46:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977470426] [2023-11-28 23:46:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977470426] [2023-11-28 23:46:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977470426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:35,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:35,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:46:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031189550] [2023-11-28 23:46:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:35,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:35,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:35,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-11-28 23:46:35,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:35,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:35,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-11-28 23:46:35,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:52,880 INFO L124 PetriNetUnfolderBase]: 151893/226584 cut-off events. [2023-11-28 23:46:52,880 INFO L125 PetriNetUnfolderBase]: For 15030/15030 co-relation queries the response was YES. [2023-11-28 23:46:53,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410105 conditions, 226584 events. 151893/226584 cut-off events. For 15030/15030 co-relation queries the response was YES. Maximal size of possible extension queue 7615. Compared 1946708 event pairs, 141525 based on Foata normal form. 0/209305 useless extension candidates. Maximal degree in co-relation 410094. Up to 178848 conditions per place. [2023-11-28 23:46:54,916 INFO L140 encePairwiseOnDemand]: 98/100 looper letters, 33 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-11-28 23:46:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 258 flow [2023-11-28 23:46:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:46:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-11-28 23:46:54,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2023-11-28 23:46:54,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-11-28 23:46:54,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-11-28 23:46:54,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:54,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-11-28 23:46:54,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:54,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:54,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:54,920 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 192 flow. Second operand 3 states and 179 transitions. [2023-11-28 23:46:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 258 flow [2023-11-28 23:46:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:46:54,936 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 191 flow [2023-11-28 23:46:54,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-11-28 23:46:54,937 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -7 predicate places. [2023-11-28 23:46:54,937 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 191 flow [2023-11-28 23:46:54,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:54,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-28 23:46:54,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:46:54,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1052982049, now seen corresponding path program 1 times [2023-11-28 23:46:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345308266] [2023-11-28 23:46:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:54,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:54,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345308266] [2023-11-28 23:46:54,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345308266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:54,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:54,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928203008] [2023-11-28 23:46:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:54,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 100 [2023-11-28 23:46:54,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:54,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:54,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 100 [2023-11-28 23:46:54,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:47:16,542 INFO L124 PetriNetUnfolderBase]: 217726/308692 cut-off events. [2023-11-28 23:47:16,542 INFO L125 PetriNetUnfolderBase]: For 9335/9335 co-relation queries the response was YES. [2023-11-28 23:47:18,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587074 conditions, 308692 events. 217726/308692 cut-off events. For 9335/9335 co-relation queries the response was YES. Maximal size of possible extension queue 9855. Compared 2548094 event pairs, 49768 based on Foata normal form. 0/295729 useless extension candidates. Maximal degree in co-relation 587062. Up to 114045 conditions per place. [2023-11-28 23:47:19,358 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 88 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2023-11-28 23:47:19,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 519 flow [2023-11-28 23:47:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:47:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:47:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-11-28 23:47:19,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2023-11-28 23:47:19,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-11-28 23:47:19,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-11-28 23:47:19,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:47:19,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-11-28 23:47:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:19,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:19,362 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:19,363 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 191 flow. Second operand 4 states and 272 transitions. [2023-11-28 23:47:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 519 flow [2023-11-28 23:47:19,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:47:19,369 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 194 flow [2023-11-28 23:47:19,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-11-28 23:47:19,369 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -5 predicate places. [2023-11-28 23:47:19,369 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 194 flow [2023-11-28 23:47:19,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:19,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:47:19,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:19,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-28 23:47:19,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:47:19,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1051998946, now seen corresponding path program 1 times [2023-11-28 23:47:19,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961074692] [2023-11-28 23:47:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:19,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:19,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961074692] [2023-11-28 23:47:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961074692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:47:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:47:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:47:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106275095] [2023-11-28 23:47:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:47:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:47:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:47:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:47:19,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 100 [2023-11-28 23:47:19,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:19,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:47:19,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 100 [2023-11-28 23:47:19,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:47:39,493 INFO L124 PetriNetUnfolderBase]: 217726/290032 cut-off events. [2023-11-28 23:47:39,493 INFO L125 PetriNetUnfolderBase]: For 13985/13985 co-relation queries the response was YES. [2023-11-28 23:47:40,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577744 conditions, 290032 events. 217726/290032 cut-off events. For 13985/13985 co-relation queries the response was YES. Maximal size of possible extension queue 8687. Compared 2086004 event pairs, 49768 based on Foata normal form. 4665/285622 useless extension candidates. Maximal degree in co-relation 577732. Up to 114045 conditions per place. [2023-11-28 23:47:42,106 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 89 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-11-28 23:47:42,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 514 flow [2023-11-28 23:47:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:47:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:47:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2023-11-28 23:47:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2023-11-28 23:47:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 268 transitions. [2023-11-28 23:47:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 268 transitions. [2023-11-28 23:47:42,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:47:42,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 268 transitions. [2023-11-28 23:47:42,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:42,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:42,112 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:42,112 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 194 flow. Second operand 4 states and 268 transitions. [2023-11-28 23:47:42,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 514 flow [2023-11-28 23:47:42,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 129 transitions, 511 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:47:42,157 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 185 flow [2023-11-28 23:47:42,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-28 23:47:42,158 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -8 predicate places. [2023-11-28 23:47:42,158 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 185 flow [2023-11-28 23:47:42,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:42,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:47:42,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-28 23:47:42,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:47:42,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash 111217817, now seen corresponding path program 1 times [2023-11-28 23:47:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77920970] [2023-11-28 23:47:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:47:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77920970] [2023-11-28 23:47:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77920970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:47:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:47:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:47:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692996678] [2023-11-28 23:47:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:47:42,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:47:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:47:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:47:42,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 100 [2023-11-28 23:47:42,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:42,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:47:42,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 100 [2023-11-28 23:47:42,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand