./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu --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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:38,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:38,578 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:06:38,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:38,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:38,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:38,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:38,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:38,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:38,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:38,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:38,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:38,641 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:38,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:38,644 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:38,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:38,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:38,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:38,646 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:06:38,647 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:06:38,647 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:06:38,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:38,649 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:06:38,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:06:38,650 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:38,650 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:38,651 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:38,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:38,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:38,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:38,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:38,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:38,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:38,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:38,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:38,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:38,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:38,657 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:38,657 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_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2023-11-19 08:06:38,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:39,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:39,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:39,010 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:39,011 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:39,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-19 08:06:42,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:42,701 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:42,702 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-19 08:06:42,730 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/data/e7d67d8c5/2c1baa7f48254863acb07bf8fc67cd36/FLAG2d2b65416 [2023-11-19 08:06:42,749 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/data/e7d67d8c5/2c1baa7f48254863acb07bf8fc67cd36 [2023-11-19 08:06:42,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:42,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:42,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:42,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:42,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:42,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:42" (1/1) ... [2023-11-19 08:06:42,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22196e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:42, skipping insertion in model container [2023-11-19 08:06:42,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:42" (1/1) ... [2023-11-19 08:06:42,818 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:43,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:43,470 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:43,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:43,634 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:43,635 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:43,644 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:43,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43 WrapperNode [2023-11-19 08:06:43,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:43,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:43,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:43,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:43,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,746 INFO L138 Inliner]: procedures = 275, calls = 24, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2023-11-19 08:06:43,749 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:43,750 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:43,750 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:43,750 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:43,761 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:43,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:43,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:43,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:43,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (1/1) ... [2023-11-19 08:06:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:43,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:43,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:06:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-19 08:06:43,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-19 08:06:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:06:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:06:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:06:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:06:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:06:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:43,915 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:06:44,146 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:44,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:44,482 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:44,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:44,561 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:06:44,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:44 BoogieIcfgContainer [2023-11-19 08:06:44,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:44,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:06:44,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:06:44,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:06:44,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:42" (1/3) ... [2023-11-19 08:06:44,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33806095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:44, skipping insertion in model container [2023-11-19 08:06:44,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:43" (2/3) ... [2023-11-19 08:06:44,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33806095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:44, skipping insertion in model container [2023-11-19 08:06:44,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:44" (3/3) ... [2023-11-19 08:06:44,581 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-11-19 08:06:44,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:06:44,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 08:06:44,607 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:06:44,695 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:06:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,829 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 08:06:44,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-19 08:06:44,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:44,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 186 flow [2023-11-19 08:06:44,914 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 08:06:44,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:44,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-19 08:06:44,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 1560 [2023-11-19 08:06:49,184 INFO L134 LiptonReduction]: Checked pairs total: 1590 [2023-11-19 08:06:49,185 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-19 08:06:49,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:49,210 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;@49c92715, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:49,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 08:06:49,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:06:49,214 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 08:06:49,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:49,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:06:49,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:49,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash 13757, now seen corresponding path program 1 times [2023-11-19 08:06:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607417752] [2023-11-19 08:06:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:49,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607417752] [2023-11-19 08:06:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607417752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:49,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620638959] [2023-11-19 08:06:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:49,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:49,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-19 08:06:49,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:49,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-19 08:06:49,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:49,864 INFO L124 PetriNetUnfolderBase]: 19/47 cut-off events. [2023-11-19 08:06:49,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:49,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 47 events. 19/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 123 event pairs, 15 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 84. Up to 46 conditions per place. [2023-11-19 08:06:49,867 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 10 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-11-19 08:06:49,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 12 transitions, 50 flow [2023-11-19 08:06:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-19 08:06:49,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149305555555556 [2023-11-19 08:06:49,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-19 08:06:49,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-19 08:06:49,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:49,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-19 08:06:49,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:49,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:49,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:49,908 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 34 flow. Second operand 3 states and 239 transitions. [2023-11-19 08:06:49,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 12 transitions, 50 flow [2023-11-19 08:06:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 50 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:06:49,913 INFO L231 Difference]: Finished difference. Result has 16 places, 12 transitions, 30 flow [2023-11-19 08:06:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=12} [2023-11-19 08:06:49,920 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-11-19 08:06:49,921 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 12 transitions, 30 flow [2023-11-19 08:06:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:49,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:49,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:06:49,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:49,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:49,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash 13755, now seen corresponding path program 1 times [2023-11-19 08:06:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300680596] [2023-11-19 08:06:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:49,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300680596] [2023-11-19 08:06:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300680596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:50,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:50,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494923209] [2023-11-19 08:06:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:50,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:50,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 192 [2023-11-19 08:06:50,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:50,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 192 [2023-11-19 08:06:50,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:50,091 INFO L124 PetriNetUnfolderBase]: 13/34 cut-off events. [2023-11-19 08:06:50,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:50,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 77 event pairs, 10 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 67. Up to 33 conditions per place. [2023-11-19 08:06:50,093 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-11-19 08:06:50,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-11-19 08:06:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-11-19 08:06:50,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045138888888889 [2023-11-19 08:06:50,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-11-19 08:06:50,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-11-19 08:06:50,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:50,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-11-19 08:06:50,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,104 INFO L175 Difference]: Start difference. First operand has 16 places, 12 transitions, 30 flow. Second operand 3 states and 233 transitions. [2023-11-19 08:06:50,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-11-19 08:06:50,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:50,105 INFO L231 Difference]: Finished difference. Result has 16 places, 11 transitions, 29 flow [2023-11-19 08:06:50,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=29, PETRI_PLACES=16, PETRI_TRANSITIONS=11} [2023-11-19 08:06:50,106 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-11-19 08:06:50,107 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 11 transitions, 29 flow [2023-11-19 08:06:50,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:50,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:06:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:06:50,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:50,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 410106055, now seen corresponding path program 1 times [2023-11-19 08:06:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:50,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6735106] [2023-11-19 08:06:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6735106] [2023-11-19 08:06:50,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6735106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:50,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:50,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971908553] [2023-11-19 08:06:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:50,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 192 [2023-11-19 08:06:50,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 29 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:50,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 192 [2023-11-19 08:06:50,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:50,504 INFO L124 PetriNetUnfolderBase]: 21/54 cut-off events. [2023-11-19 08:06:50,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:50,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 54 events. 21/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 153 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 107. Up to 29 conditions per place. [2023-11-19 08:06:50,506 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 15 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-11-19 08:06:50,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 19 transitions, 81 flow [2023-11-19 08:06:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-11-19 08:06:50,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997395833333333 [2023-11-19 08:06:50,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-11-19 08:06:50,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-11-19 08:06:50,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:50,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-11-19 08:06:50,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,519 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 29 flow. Second operand 4 states and 307 transitions. [2023-11-19 08:06:50,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 19 transitions, 81 flow [2023-11-19 08:06:50,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:50,520 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 42 flow [2023-11-19 08:06:50,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-11-19 08:06:50,522 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2023-11-19 08:06:50,522 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 42 flow [2023-11-19 08:06:50,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:50,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:50,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:06:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:06:50,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:50,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 410106062, now seen corresponding path program 1 times [2023-11-19 08:06:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:50,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378492857] [2023-11-19 08:06:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:50,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378492857] [2023-11-19 08:06:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378492857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:50,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:50,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804875378] [2023-11-19 08:06:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:50,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:51,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 192 [2023-11-19 08:06:51,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:51,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 192 [2023-11-19 08:06:51,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:51,098 INFO L124 PetriNetUnfolderBase]: 19/49 cut-off events. [2023-11-19 08:06:51,099 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:06:51,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 49 events. 19/49 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 138 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 112. Up to 29 conditions per place. [2023-11-19 08:06:51,101 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 14 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2023-11-19 08:06:51,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 88 flow [2023-11-19 08:06:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2023-11-19 08:06:51,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2023-11-19 08:06:51,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2023-11-19 08:06:51,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2023-11-19 08:06:51,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:51,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2023-11-19 08:06:51,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,112 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 42 flow. Second operand 4 states and 294 transitions. [2023-11-19 08:06:51,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 88 flow [2023-11-19 08:06:51,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 18 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:51,114 INFO L231 Difference]: Finished difference. Result has 21 places, 12 transitions, 48 flow [2023-11-19 08:06:51,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=21, PETRI_TRANSITIONS=12} [2023-11-19 08:06:51,116 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2023-11-19 08:06:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 12 transitions, 48 flow [2023-11-19 08:06:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:51,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:06:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:06:51,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:51,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash 410106061, now seen corresponding path program 1 times [2023-11-19 08:06:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:51,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599850444] [2023-11-19 08:06:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599850444] [2023-11-19 08:06:51,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599850444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:51,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:51,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407983326] [2023-11-19 08:06:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 192 [2023-11-19 08:06:51,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 12 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:51,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 192 [2023-11-19 08:06:51,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:51,260 INFO L124 PetriNetUnfolderBase]: 15/39 cut-off events. [2023-11-19 08:06:51,267 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 08:06:51,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 39 events. 15/39 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 86 event pairs, 12 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 101. Up to 38 conditions per place. [2023-11-19 08:06:51,271 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-11-19 08:06:51,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 11 transitions, 66 flow [2023-11-19 08:06:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-11-19 08:06:51,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2023-11-19 08:06:51,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-11-19 08:06:51,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-11-19 08:06:51,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:51,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-11-19 08:06:51,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,280 INFO L175 Difference]: Start difference. First operand has 21 places, 12 transitions, 48 flow. Second operand 3 states and 238 transitions. [2023-11-19 08:06:51,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 11 transitions, 66 flow [2023-11-19 08:06:51,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 11 transitions, 60 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:06:51,283 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 42 flow [2023-11-19 08:06:51,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-11-19 08:06:51,286 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2023-11-19 08:06:51,286 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 42 flow [2023-11-19 08:06:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:51,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:51,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:06:51,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:06:51,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:06:51,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:51,289 INFO L85 PathProgramCache]: Analyzing trace with hash -171680038, now seen corresponding path program 1 times [2023-11-19 08:06:51,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:51,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132328850] [2023-11-19 08:06:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:51,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:51,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:06:51,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-19 08:06:51,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-19 08:06:51,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-19 08:06:51,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-19 08:06:51,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-11-19 08:06:51,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-19 08:06:51,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-11-19 08:06:51,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-19 08:06:51,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-19 08:06:51,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 10 remaining) [2023-11-19 08:06:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:06:51,373 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 08:06:51,378 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:06:51,379 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:06:51,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:06:51,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,490 INFO L124 PetriNetUnfolderBase]: 14/167 cut-off events. [2023-11-19 08:06:51,490 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:06:51,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 14/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-19 08:06:51,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:51,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 131 transitions, 272 flow [2023-11-19 08:06:51,543 INFO L124 PetriNetUnfolderBase]: 14/167 cut-off events. [2023-11-19 08:06:51,543 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:06:51,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 14/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-19 08:06:51,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2023-11-19 08:06:55,605 INFO L134 LiptonReduction]: Checked pairs total: 11749 [2023-11-19 08:06:55,606 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-19 08:06:55,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:55,609 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;@49c92715, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:55,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-19 08:06:55,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:06:55,611 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:06:55,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:55,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:55,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:06:55,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:55,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 23594, now seen corresponding path program 1 times [2023-11-19 08:06:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:55,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170907246] [2023-11-19 08:06:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:55,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:55,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170907246] [2023-11-19 08:06:55,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170907246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:55,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:55,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334384617] [2023-11-19 08:06:55,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:55,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2023-11-19 08:06:55,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:55,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2023-11-19 08:06:55,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:55,862 INFO L124 PetriNetUnfolderBase]: 490/840 cut-off events. [2023-11-19 08:06:55,862 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:06:55,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 840 events. 490/840 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4554 event pairs, 376 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 782. Up to 763 conditions per place. [2023-11-19 08:06:55,871 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 24 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 08:06:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 124 flow [2023-11-19 08:06:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-19 08:06:55,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261294261294261 [2023-11-19 08:06:55,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-19 08:06:55,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-19 08:06:55,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:55,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-19 08:06:55,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,880 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 80 flow. Second operand 3 states and 349 transitions. [2023-11-19 08:06:55,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 124 flow [2023-11-19 08:06:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:06:55,884 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 76 flow [2023-11-19 08:06:55,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-19 08:06:55,887 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-19 08:06:55,887 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 76 flow [2023-11-19 08:06:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:06:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:06:55,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 23593, now seen corresponding path program 1 times [2023-11-19 08:06:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992656395] [2023-11-19 08:06:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:55,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:55,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992656395] [2023-11-19 08:06:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992656395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:55,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876307561] [2023-11-19 08:06:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:55,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:55,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-19 08:06:55,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:55,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:55,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-19 08:06:55,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:56,106 INFO L124 PetriNetUnfolderBase]: 300/539 cut-off events. [2023-11-19 08:06:56,106 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:06:56,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 539 events. 300/539 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2624 event pairs, 224 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 1048. Up to 482 conditions per place. [2023-11-19 08:06:56,111 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 23 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-19 08:06:56,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 122 flow [2023-11-19 08:06:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-19 08:06:56,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261294261294261 [2023-11-19 08:06:56,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-19 08:06:56,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-19 08:06:56,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-19 08:06:56,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,118 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 76 flow. Second operand 3 states and 349 transitions. [2023-11-19 08:06:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 122 flow [2023-11-19 08:06:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:56,120 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 75 flow [2023-11-19 08:06:56,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-19 08:06:56,121 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-19 08:06:56,121 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 75 flow [2023-11-19 08:06:56,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:56,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:06:56,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:56,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1743309400, now seen corresponding path program 1 times [2023-11-19 08:06:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211922647] [2023-11-19 08:06:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:56,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:56,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211922647] [2023-11-19 08:06:56,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211922647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:56,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:56,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213293327] [2023-11-19 08:06:56,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:56,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:56,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:56,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-19 08:06:56,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:56,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-19 08:06:56,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:56,397 INFO L124 PetriNetUnfolderBase]: 486/836 cut-off events. [2023-11-19 08:06:56,398 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-19 08:06:56,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 836 events. 486/836 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4831 event pairs, 197 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1669. Up to 431 conditions per place. [2023-11-19 08:06:56,405 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 38 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-11-19 08:06:56,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 198 flow [2023-11-19 08:06:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-11-19 08:06:56,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434981684981685 [2023-11-19 08:06:56,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-11-19 08:06:56,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-11-19 08:06:56,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-11-19 08:06:56,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,414 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 75 flow. Second operand 4 states and 475 transitions. [2023-11-19 08:06:56,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 198 flow [2023-11-19 08:06:56,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:56,417 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 91 flow [2023-11-19 08:06:56,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-19 08:06:56,418 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-19 08:06:56,418 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 91 flow [2023-11-19 08:06:56,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:56,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:56,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:06:56,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:56,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1743309420, now seen corresponding path program 1 times [2023-11-19 08:06:56,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:56,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953832837] [2023-11-19 08:06:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953832837] [2023-11-19 08:06:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953832837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:56,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:56,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:56,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355104914] [2023-11-19 08:06:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:56,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-19 08:06:56,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:56,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-19 08:06:56,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:56,664 INFO L124 PetriNetUnfolderBase]: 435/741 cut-off events. [2023-11-19 08:06:56,664 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-19 08:06:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 741 events. 435/741 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3934 event pairs, 224 based on Foata normal form. 20/519 useless extension candidates. Maximal degree in co-relation 1600. Up to 463 conditions per place. [2023-11-19 08:06:56,671 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 38 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 08:06:56,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 199 flow [2023-11-19 08:06:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-19 08:06:56,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481074481074481 [2023-11-19 08:06:56,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-19 08:06:56,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-19 08:06:56,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-19 08:06:56,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,679 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 91 flow. Second operand 3 states and 367 transitions. [2023-11-19 08:06:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 199 flow [2023-11-19 08:06:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:06:56,683 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 90 flow [2023-11-19 08:06:56,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-19 08:06:56,684 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-19 08:06:56,685 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 90 flow [2023-11-19 08:06:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:56,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:56,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:56,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:06:56,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:56,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648002, now seen corresponding path program 1 times [2023-11-19 08:06:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:56,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435474173] [2023-11-19 08:06:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:56,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:56,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435474173] [2023-11-19 08:06:56,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435474173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:56,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:56,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897405520] [2023-11-19 08:06:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:06:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:06:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:57,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 273 [2023-11-19 08:06:57,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:57,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 273 [2023-11-19 08:06:57,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:57,700 INFO L124 PetriNetUnfolderBase]: 774/1348 cut-off events. [2023-11-19 08:06:57,700 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-19 08:06:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 1348 events. 774/1348 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8211 event pairs, 146 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 2981. Up to 540 conditions per place. [2023-11-19 08:06:57,715 INFO L140 encePairwiseOnDemand]: 263/273 looper letters, 85 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-11-19 08:06:57,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 101 transitions, 466 flow [2023-11-19 08:06:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:06:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 669 transitions. [2023-11-19 08:06:57,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084249084249084 [2023-11-19 08:06:57,720 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 669 transitions. [2023-11-19 08:06:57,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 669 transitions. [2023-11-19 08:06:57,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:57,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 669 transitions. [2023-11-19 08:06:57,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.5) internal successors, (669), 6 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,730 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 90 flow. Second operand 6 states and 669 transitions. [2023-11-19 08:06:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 101 transitions, 466 flow [2023-11-19 08:06:57,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 101 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:57,737 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 174 flow [2023-11-19 08:06:57,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-19 08:06:57,740 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-19 08:06:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 174 flow [2023-11-19 08:06:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:57,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:57,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:06:57,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:57,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648001, now seen corresponding path program 1 times [2023-11-19 08:06:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:57,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590466805] [2023-11-19 08:06:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590466805] [2023-11-19 08:06:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590466805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:57,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086238529] [2023-11-19 08:06:57,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:57,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:57,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:57,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2023-11-19 08:06:57,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:57,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:57,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2023-11-19 08:06:57,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:58,040 INFO L124 PetriNetUnfolderBase]: 591/1068 cut-off events. [2023-11-19 08:06:58,040 INFO L125 PetriNetUnfolderBase]: For 774/813 co-relation queries the response was YES. [2023-11-19 08:06:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 1068 events. 591/1068 cut-off events. For 774/813 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6248 event pairs, 457 based on Foata normal form. 55/988 useless extension candidates. Maximal degree in co-relation 2689. Up to 971 conditions per place. [2023-11-19 08:06:58,052 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 28 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-19 08:06:58,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 226 flow [2023-11-19 08:06:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-19 08:06:58,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2023-11-19 08:06:58,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-19 08:06:58,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-19 08:06:58,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:58,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-19 08:06:58,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,061 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 174 flow. Second operand 3 states and 345 transitions. [2023-11-19 08:06:58,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 226 flow [2023-11-19 08:06:58,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:58,067 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 166 flow [2023-11-19 08:06:58,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-19 08:06:58,068 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2023-11-19 08:06:58,068 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 166 flow [2023-11-19 08:06:58,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:58,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:58,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:06:58,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:58,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648022, now seen corresponding path program 1 times [2023-11-19 08:06:58,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:58,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247363135] [2023-11-19 08:06:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247363135] [2023-11-19 08:06:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247363135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198756189] [2023-11-19 08:06:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:58,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-11-19 08:06:58,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:58,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-11-19 08:06:58,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:58,555 INFO L124 PetriNetUnfolderBase]: 672/1161 cut-off events. [2023-11-19 08:06:58,556 INFO L125 PetriNetUnfolderBase]: For 706/722 co-relation queries the response was YES. [2023-11-19 08:06:58,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 1161 events. 672/1161 cut-off events. For 706/722 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6954 event pairs, 72 based on Foata normal form. 30/1051 useless extension candidates. Maximal degree in co-relation 3023. Up to 425 conditions per place. [2023-11-19 08:06:58,568 INFO L140 encePairwiseOnDemand]: 266/273 looper letters, 64 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-19 08:06:58,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 455 flow [2023-11-19 08:06:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:06:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:06:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-11-19 08:06:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315018315018315 [2023-11-19 08:06:58,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-11-19 08:06:58,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-11-19 08:06:58,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:58,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-11-19 08:06:58,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,580 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 166 flow. Second operand 5 states and 589 transitions. [2023-11-19 08:06:58,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 455 flow [2023-11-19 08:06:58,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 80 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:58,588 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 219 flow [2023-11-19 08:06:58,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-19 08:06:58,589 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2023-11-19 08:06:58,590 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 219 flow [2023-11-19 08:06:58,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:58,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:58,590 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:06:58,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:06:58,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:06:58,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1229485326, now seen corresponding path program 1 times [2023-11-19 08:06:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:58,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703901380] [2023-11-19 08:06:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:58,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:06:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:06:58,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:06:58,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:06:58,630 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-19 08:06:58,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-19 08:06:58,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-19 08:06:58,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-19 08:06:58,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (8 of 13 remaining) [2023-11-19 08:06:58,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-19 08:06:58,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-11-19 08:06:58,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 13 remaining) [2023-11-19 08:06:58,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-19 08:06:58,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-11-19 08:06:58,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2023-11-19 08:06:58,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-19 08:06:58,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 13 remaining) [2023-11-19 08:06:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:06:58,633 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:58,634 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:06:58,634 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:06:58,670 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:06:58,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,707 INFO L124 PetriNetUnfolderBase]: 20/226 cut-off events. [2023-11-19 08:06:58,708 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:06:58,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 20/226 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 657 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-19 08:06:58,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:58,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 171 transitions, 360 flow [2023-11-19 08:06:58,752 INFO L124 PetriNetUnfolderBase]: 20/226 cut-off events. [2023-11-19 08:06:58,752 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:06:58,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 20/226 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 657 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-19 08:06:58,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 14040 [2023-11-19 08:07:03,879 INFO L134 LiptonReduction]: Checked pairs total: 27219 [2023-11-19 08:07:03,880 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-11-19 08:07:03,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:07:03,882 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;@49c92715, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:07:03,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-19 08:07:03,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:07:03,884 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:07:03,884 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:07:03,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:03,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:07:03,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:03,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 36443, now seen corresponding path program 1 times [2023-11-19 08:07:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:03,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471452057] [2023-11-19 08:07:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471452057] [2023-11-19 08:07:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471452057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:03,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:03,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:07:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734499078] [2023-11-19 08:07:03,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:03,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:03,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:03,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-19 08:07:03,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:03,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:03,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-19 08:07:03,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:05,614 INFO L124 PetriNetUnfolderBase]: 7834/11230 cut-off events. [2023-11-19 08:07:05,614 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2023-11-19 08:07:05,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22125 conditions, 11230 events. 7834/11230 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 68778 event pairs, 6154 based on Foata normal form. 0/6026 useless extension candidates. Maximal degree in co-relation 2362. Up to 10537 conditions per place. [2023-11-19 08:07:05,727 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-19 08:07:05,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 184 flow [2023-11-19 08:07:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-11-19 08:07:05,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323062558356676 [2023-11-19 08:07:05,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-11-19 08:07:05,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-11-19 08:07:05,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:05,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-11-19 08:07:05,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:05,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:05,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:05,737 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 116 flow. Second operand 3 states and 463 transitions. [2023-11-19 08:07:05,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 184 flow [2023-11-19 08:07:05,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 182 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:07:05,741 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 110 flow [2023-11-19 08:07:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-19 08:07:05,743 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-19 08:07:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 110 flow [2023-11-19 08:07:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:05,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:05,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:07:05,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:07:05,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:05,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash 36441, now seen corresponding path program 1 times [2023-11-19 08:07:05,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:05,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381004018] [2023-11-19 08:07:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:05,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:05,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:05,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381004018] [2023-11-19 08:07:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381004018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:05,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:07:05,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426625640] [2023-11-19 08:07:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:05,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:05,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 357 [2023-11-19 08:07:05,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:05,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:05,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 357 [2023-11-19 08:07:05,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:06,805 INFO L124 PetriNetUnfolderBase]: 4953/7266 cut-off events. [2023-11-19 08:07:06,805 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-11-19 08:07:06,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14300 conditions, 7266 events. 4953/7266 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42081 event pairs, 3833 based on Foata normal form. 0/4363 useless extension candidates. Maximal degree in co-relation 14291. Up to 6755 conditions per place. [2023-11-19 08:07:06,879 INFO L140 encePairwiseOnDemand]: 355/357 looper letters, 35 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 08:07:06,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 180 flow [2023-11-19 08:07:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-11-19 08:07:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42670401493930904 [2023-11-19 08:07:06,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-11-19 08:07:06,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-11-19 08:07:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:06,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-11-19 08:07:06,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:06,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:06,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:06,891 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 457 transitions. [2023-11-19 08:07:06,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 180 flow [2023-11-19 08:07:06,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:06,894 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-11-19 08:07:06,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-19 08:07:06,896 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-19 08:07:06,897 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-11-19 08:07:06,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:06,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:06,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:07:06,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:06,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 511404961, now seen corresponding path program 1 times [2023-11-19 08:07:06,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:06,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716063476] [2023-11-19 08:07:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:06,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:06,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:06,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716063476] [2023-11-19 08:07:06,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716063476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:06,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:06,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:06,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217991610] [2023-11-19 08:07:06,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:06,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:06,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-19 08:07:06,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:06,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:06,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-19 08:07:06,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:08,531 INFO L124 PetriNetUnfolderBase]: 7393/10676 cut-off events. [2023-11-19 08:07:08,532 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-11-19 08:07:08,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21301 conditions, 10676 events. 7393/10676 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 66135 event pairs, 3833 based on Foata normal form. 0/6712 useless extension candidates. Maximal degree in co-relation 21291. Up to 6556 conditions per place. [2023-11-19 08:07:08,616 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 62 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-11-19 08:07:08,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 299 flow [2023-11-19 08:07:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-11-19 08:07:08,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584500466853408 [2023-11-19 08:07:08,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-11-19 08:07:08,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-11-19 08:07:08,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:08,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-11-19 08:07:08,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,625 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 3 states and 491 transitions. [2023-11-19 08:07:08,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 299 flow [2023-11-19 08:07:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:08,632 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 122 flow [2023-11-19 08:07:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, 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=3, PETRI_FLOW=122, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-19 08:07:08,633 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-11-19 08:07:08,633 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 122 flow [2023-11-19 08:07:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 08:07:08,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:08,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729294, now seen corresponding path program 1 times [2023-11-19 08:07:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475563902] [2023-11-19 08:07:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475563902] [2023-11-19 08:07:08,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475563902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437309852] [2023-11-19 08:07:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:07:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:07:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:09,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 357 [2023-11-19 08:07:09,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:09,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:09,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 357 [2023-11-19 08:07:09,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:11,433 INFO L124 PetriNetUnfolderBase]: 9221/14217 cut-off events. [2023-11-19 08:07:11,433 INFO L125 PetriNetUnfolderBase]: For 1505/1505 co-relation queries the response was YES. [2023-11-19 08:07:11,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29470 conditions, 14217 events. 9221/14217 cut-off events. For 1505/1505 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 102300 event pairs, 3287 based on Foata normal form. 0/10268 useless extension candidates. Maximal degree in co-relation 29459. Up to 6551 conditions per place. [2023-11-19 08:07:11,566 INFO L140 encePairwiseOnDemand]: 342/357 looper letters, 102 selfloop transitions, 15 changer transitions 0/125 dead transitions. [2023-11-19 08:07:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 568 flow [2023-11-19 08:07:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:07:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:07:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-11-19 08:07:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41830065359477125 [2023-11-19 08:07:11,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-11-19 08:07:11,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-11-19 08:07:11,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:11,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-11-19 08:07:11,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,581 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 122 flow. Second operand 6 states and 896 transitions. [2023-11-19 08:07:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 568 flow [2023-11-19 08:07:11,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 125 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:07:11,603 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 240 flow [2023-11-19 08:07:11,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-11-19 08:07:11,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-19 08:07:11,604 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 240 flow [2023-11-19 08:07:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:11,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 08:07:11,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:11,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729284, now seen corresponding path program 1 times [2023-11-19 08:07:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044668187] [2023-11-19 08:07:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044668187] [2023-11-19 08:07:11,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044668187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:11,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:11,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784592429] [2023-11-19 08:07:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:07:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:07:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:11,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-19 08:07:11,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:11,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:11,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-19 08:07:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:15,354 INFO L124 PetriNetUnfolderBase]: 19502/29094 cut-off events. [2023-11-19 08:07:15,354 INFO L125 PetriNetUnfolderBase]: For 19818/20156 co-relation queries the response was YES. [2023-11-19 08:07:15,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74231 conditions, 29094 events. 19502/29094 cut-off events. For 19818/20156 co-relation queries the response was YES. Maximal size of possible extension queue 2049. Compared 219147 event pairs, 3742 based on Foata normal form. 140/22713 useless extension candidates. Maximal degree in co-relation 74215. Up to 11726 conditions per place. [2023-11-19 08:07:15,622 INFO L140 encePairwiseOnDemand]: 343/357 looper letters, 174 selfloop transitions, 34 changer transitions 0/216 dead transitions. [2023-11-19 08:07:15,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 216 transitions, 1290 flow [2023-11-19 08:07:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:07:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:07:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1091 transitions. [2023-11-19 08:07:15,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365746298519408 [2023-11-19 08:07:15,630 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1091 transitions. [2023-11-19 08:07:15,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1091 transitions. [2023-11-19 08:07:15,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:15,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1091 transitions. [2023-11-19 08:07:15,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.85714285714286) internal successors, (1091), 7 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,643 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 240 flow. Second operand 7 states and 1091 transitions. [2023-11-19 08:07:15,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 216 transitions, 1290 flow [2023-11-19 08:07:15,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 216 transitions, 1289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:15,669 INFO L231 Difference]: Finished difference. Result has 65 places, 89 transitions, 632 flow [2023-11-19 08:07:15,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=65, PETRI_TRANSITIONS=89} [2023-11-19 08:07:15,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2023-11-19 08:07:15,670 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 89 transitions, 632 flow [2023-11-19 08:07:15,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:15,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:15,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 08:07:15,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:15,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729293, now seen corresponding path program 1 times [2023-11-19 08:07:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:15,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953904528] [2023-11-19 08:07:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953904528] [2023-11-19 08:07:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953904528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:15,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:15,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:07:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119600005] [2023-11-19 08:07:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:15,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 357 [2023-11-19 08:07:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 89 transitions, 632 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 357 [2023-11-19 08:07:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:18,422 INFO L124 PetriNetUnfolderBase]: 12341/18733 cut-off events. [2023-11-19 08:07:18,422 INFO L125 PetriNetUnfolderBase]: For 40981/41941 co-relation queries the response was YES. [2023-11-19 08:07:18,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57356 conditions, 18733 events. 12341/18733 cut-off events. For 40981/41941 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 135226 event pairs, 8098 based on Foata normal form. 1178/16675 useless extension candidates. Maximal degree in co-relation 57334. Up to 17017 conditions per place. [2023-11-19 08:07:18,604 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 71 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-19 08:07:18,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 768 flow [2023-11-19 08:07:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-11-19 08:07:18,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173669467787115 [2023-11-19 08:07:18,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-11-19 08:07:18,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-11-19 08:07:18,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:18,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-11-19 08:07:18,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:18,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:18,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:18,614 INFO L175 Difference]: Start difference. First operand has 65 places, 89 transitions, 632 flow. Second operand 3 states and 447 transitions. [2023-11-19 08:07:18,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 768 flow [2023-11-19 08:07:18,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 768 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:07:18,703 INFO L231 Difference]: Finished difference. Result has 64 places, 86 transitions, 626 flow [2023-11-19 08:07:18,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=64, PETRI_TRANSITIONS=86} [2023-11-19 08:07:18,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-11-19 08:07:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 86 transitions, 626 flow [2023-11-19 08:07:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:18,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:18,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 08:07:18,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:18,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash 464563011, now seen corresponding path program 1 times [2023-11-19 08:07:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:18,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735644332] [2023-11-19 08:07:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:07:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735644332] [2023-11-19 08:07:18,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735644332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:18,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:18,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484945441] [2023-11-19 08:07:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:18,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-19 08:07:18,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 86 transitions, 626 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:18,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:18,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-19 08:07:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:07:22,011 INFO L124 PetriNetUnfolderBase]: 17520/25835 cut-off events. [2023-11-19 08:07:22,011 INFO L125 PetriNetUnfolderBase]: For 50267/51704 co-relation queries the response was YES. [2023-11-19 08:07:22,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77575 conditions, 25835 events. 17520/25835 cut-off events. For 50267/51704 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 189070 event pairs, 7792 based on Foata normal form. 707/22801 useless extension candidates. Maximal degree in co-relation 77551. Up to 15416 conditions per place. [2023-11-19 08:07:22,245 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 119 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-11-19 08:07:22,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 1213 flow [2023-11-19 08:07:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:07:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-11-19 08:07:22,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446311858076564 [2023-11-19 08:07:22,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-11-19 08:07:22,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-11-19 08:07:22,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:07:22,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-11-19 08:07:22,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:22,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:22,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:22,256 INFO L175 Difference]: Start difference. First operand has 64 places, 86 transitions, 626 flow. Second operand 3 states and 478 transitions. [2023-11-19 08:07:22,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 1213 flow [2023-11-19 08:07:22,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 133 transitions, 1212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:07:22,347 INFO L231 Difference]: Finished difference. Result has 66 places, 86 transitions, 635 flow [2023-11-19 08:07:22,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=635, PETRI_PLACES=66, PETRI_TRANSITIONS=86} [2023-11-19 08:07:22,348 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2023-11-19 08:07:22,348 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 86 transitions, 635 flow [2023-11-19 08:07:22,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:22,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:07:22,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 08:07:22,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:07:22,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2020001686, now seen corresponding path program 1 times [2023-11-19 08:07:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:22,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771669828] [2023-11-19 08:07:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:22,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771669828] [2023-11-19 08:07:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771669828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:22,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842549724] [2023-11-19 08:07:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:22,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:22,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:22,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d1f146a-6637-4aca-95b1-577d2831734a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:07:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:22,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:07:22,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:22,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:07:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842549724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:22,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:07:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:07:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670381981] [2023-11-19 08:07:22,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:07:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:07:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:07:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-19 08:07:23,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 86 transitions, 635 flow. Second operand has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:07:23,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:07:23,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-19 08:07:23,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand