./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 084d7ddce3c53222c6533ccae99969e854061e3b422eaf94457157515e3bd009 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:08:58,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:08:58,235 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:08:58,240 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:08:58,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:08:58,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:08:58,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:08:58,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:08:58,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:08:58,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:08:58,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:08:58,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:08:58,282 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:08:58,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:08:58,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:08:58,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:08:58,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:08:58,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:08:58,293 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:08:58,293 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:08:58,295 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:08:58,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:08:58,296 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:08:58,298 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:08:58,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:08:58,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:08:58,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:08:58,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:08:58,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:08:58,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:08:58,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:08:58,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:08:58,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:08:58,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:08:58,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:08:58,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:08:58,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:08:58,306 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:08:58,306 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_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 084d7ddce3c53222c6533ccae99969e854061e3b422eaf94457157515e3bd009 [2023-11-06 22:08:58,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:08:58,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:08:58,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:08:58,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:08:58,664 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:08:58,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-06 22:09:01,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:09:02,149 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:09:02,149 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-06 22:09:02,158 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/data/521d354c5/1e34da9c6e5545939993298a3d2025ff/FLAG9dd4ff5c5 [2023-11-06 22:09:02,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/data/521d354c5/1e34da9c6e5545939993298a3d2025ff [2023-11-06 22:09:02,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:09:02,178 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:09:02,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:02,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:09:02,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:09:02,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c895682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02, skipping insertion in model container [2023-11-06 22:09:02,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,219 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:09:02,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:02,531 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:09:02,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:09:02,615 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:02,616 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:09:02,625 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:09:02,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02 WrapperNode [2023-11-06 22:09:02,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:09:02,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:02,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:09:02,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:09:02,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,725 INFO L138 Inliner]: procedures = 24, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 248 [2023-11-06 22:09:02,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:09:02,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:09:02,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:09:02,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:09:02,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:09:02,795 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:09:02,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:09:02,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:09:02,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (1/1) ... [2023-11-06 22:09:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:02,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:09:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aeb11f-97f8-4076-b055-9e28932041e8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:09:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:09:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:09:02,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:09:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:09:02,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:09:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:09:02,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:09:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:09:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:09:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:09:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 22:09:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 22:09:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:09:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:09:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:09:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:09:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:09:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:09:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:09:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:09:02,896 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:09:03,086 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:09:03,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:09:03,616 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:09:03,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:09:03,807 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:09:03,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:03 BoogieIcfgContainer [2023-11-06 22:09:03,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:09:03,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:09:03,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:09:03,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:09:03,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:09:02" (1/3) ... [2023-11-06 22:09:03,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eebdb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:03, skipping insertion in model container [2023-11-06 22:09:03,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:09:02" (2/3) ... [2023-11-06 22:09:03,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eebdb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:09:03, skipping insertion in model container [2023-11-06 22:09:03,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:09:03" (3/3) ... [2023-11-06 22:09:03,828 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-5.wvr.c [2023-11-06 22:09:03,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:09:03,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-06 22:09:03,850 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:09:03,985 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-06 22:09:04,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 197 transitions, 429 flow [2023-11-06 22:09:04,186 INFO L124 PetriNetUnfolderBase]: 2/192 cut-off events. [2023-11-06 22:09:04,186 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:09:04,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 192 events. 2/192 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 137 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 136. Up to 2 conditions per place. [2023-11-06 22:09:04,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 197 transitions, 429 flow [2023-11-06 22:09:04,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 187 transitions, 404 flow [2023-11-06 22:09:04,204 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:09:04,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 187 transitions, 404 flow [2023-11-06 22:09:04,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 187 transitions, 404 flow [2023-11-06 22:09:04,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 187 transitions, 404 flow [2023-11-06 22:09:04,310 INFO L124 PetriNetUnfolderBase]: 2/187 cut-off events. [2023-11-06 22:09:04,310 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:09:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 187 events. 2/187 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 137 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 136. Up to 2 conditions per place. [2023-11-06 22:09:04,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 2702 [2023-11-06 22:09:15,914 INFO L134 LiptonReduction]: Checked pairs total: 16683 [2023-11-06 22:09:15,915 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-06 22:09:15,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:09:15,938 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;@22881632, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:09:15,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-06 22:09:15,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:09:15,940 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:09:15,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:09:15,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:15,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:09:15,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:15,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash 776, now seen corresponding path program 1 times [2023-11-06 22:09:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:15,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649590455] [2023-11-06 22:09:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:16,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:16,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649590455] [2023-11-06 22:09:16,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649590455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:16,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:09:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369870666] [2023-11-06 22:09:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:09:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:09:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:09:16,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 363 [2023-11-06 22:09:16,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 156 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:16,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:16,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 363 [2023-11-06 22:09:16,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:20,828 INFO L124 PetriNetUnfolderBase]: 21849/30042 cut-off events. [2023-11-06 22:09:20,829 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-11-06 22:09:20,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59740 conditions, 30042 events. 21849/30042 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 182671 event pairs, 21849 based on Foata normal form. 0/26529 useless extension candidates. Maximal degree in co-relation 49150. Up to 28669 conditions per place. [2023-11-06 22:09:21,190 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 54 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2023-11-06 22:09:21,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 60 transitions, 258 flow [2023-11-06 22:09:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:09:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:09:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 395 transitions. [2023-11-06 22:09:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440771349862259 [2023-11-06 22:09:21,221 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 395 transitions. [2023-11-06 22:09:21,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 395 transitions. [2023-11-06 22:09:21,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:21,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 395 transitions. [2023-11-06 22:09:21,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:21,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:21,241 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:21,244 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 156 flow. Second operand 2 states and 395 transitions. [2023-11-06 22:09:21,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 60 transitions, 258 flow [2023-11-06 22:09:21,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-06 22:09:21,289 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 130 flow [2023-11-06 22:09:21,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-11-06 22:09:21,296 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -12 predicate places. [2023-11-06 22:09:21,296 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 130 flow [2023-11-06 22:09:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:21,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:21,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:09:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:09:21,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:21,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash 763183, now seen corresponding path program 1 times [2023-11-06 22:09:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:21,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742018621] [2023-11-06 22:09:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742018621] [2023-11-06 22:09:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742018621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:22,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808437221] [2023-11-06 22:09:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:22,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:22,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 363 [2023-11-06 22:09:22,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:22,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:22,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 363 [2023-11-06 22:09:22,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:25,031 INFO L124 PetriNetUnfolderBase]: 21078/29009 cut-off events. [2023-11-06 22:09:25,032 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:25,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56990 conditions, 29009 events. 21078/29009 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1312. Compared 176306 event pairs, 21078 based on Foata normal form. 0/25756 useless extension candidates. Maximal degree in co-relation 56987. Up to 27637 conditions per place. [2023-11-06 22:09:25,259 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 51 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-06 22:09:25,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 230 flow [2023-11-06 22:09:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-06 22:09:25,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986225895316804 [2023-11-06 22:09:25,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-06 22:09:25,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-06 22:09:25,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:25,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-06 22:09:25,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:25,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:25,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:25,272 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 130 flow. Second operand 3 states and 543 transitions. [2023-11-06 22:09:25,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 230 flow [2023-11-06 22:09:25,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:09:25,275 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 128 flow [2023-11-06 22:09:25,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-06 22:09:25,277 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -12 predicate places. [2023-11-06 22:09:25,277 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 128 flow [2023-11-06 22:09:25,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:25,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:25,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:09:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:09:25,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:25,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash 763182, now seen corresponding path program 1 times [2023-11-06 22:09:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071105492] [2023-11-06 22:09:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:25,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:25,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071105492] [2023-11-06 22:09:25,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071105492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:25,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:25,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:25,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010469489] [2023-11-06 22:09:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:25,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:25,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-06 22:09:25,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:25,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:25,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-06 22:09:25,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:28,040 INFO L124 PetriNetUnfolderBase]: 20307/27976 cut-off events. [2023-11-06 22:09:28,041 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:28,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54928 conditions, 27976 events. 20307/27976 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 169924 event pairs, 20307 based on Foata normal form. 0/24983 useless extension candidates. Maximal degree in co-relation 54924. Up to 26606 conditions per place. [2023-11-06 22:09:28,226 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 49 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-06 22:09:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 224 flow [2023-11-06 22:09:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-11-06 22:09:28,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47750229568411384 [2023-11-06 22:09:28,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-11-06 22:09:28,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-11-06 22:09:28,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:28,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-11-06 22:09:28,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:28,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:28,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:28,237 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 128 flow. Second operand 3 states and 520 transitions. [2023-11-06 22:09:28,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 224 flow [2023-11-06 22:09:28,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:28,239 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 125 flow [2023-11-06 22:09:28,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-06 22:09:28,241 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -13 predicate places. [2023-11-06 22:09:28,241 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 125 flow [2023-11-06 22:09:28,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:28,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:28,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:09:28,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:09:28,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:28,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash 733435219, now seen corresponding path program 1 times [2023-11-06 22:09:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:28,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779205533] [2023-11-06 22:09:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:28,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:28,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779205533] [2023-11-06 22:09:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779205533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:28,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:28,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:28,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446837907] [2023-11-06 22:09:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:28,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-06 22:09:28,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:28,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:28,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-06 22:09:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:30,532 INFO L124 PetriNetUnfolderBase]: 20139/27724 cut-off events. [2023-11-06 22:09:30,533 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54429 conditions, 27724 events. 20139/27724 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 168434 event pairs, 20139 based on Foata normal form. 0/24813 useless extension candidates. Maximal degree in co-relation 54425. Up to 26358 conditions per place. [2023-11-06 22:09:30,703 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 47 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-06 22:09:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 217 flow [2023-11-06 22:09:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-11-06 22:09:30,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756657483930211 [2023-11-06 22:09:30,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-11-06 22:09:30,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-11-06 22:09:30,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:30,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-11-06 22:09:30,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:30,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:30,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:30,715 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 125 flow. Second operand 3 states and 518 transitions. [2023-11-06 22:09:30,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 217 flow [2023-11-06 22:09:30,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:30,717 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 122 flow [2023-11-06 22:09:30,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-06 22:09:30,719 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -14 predicate places. [2023-11-06 22:09:30,719 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 122 flow [2023-11-06 22:09:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:30,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:30,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:09:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:09:30,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:30,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 733435221, now seen corresponding path program 1 times [2023-11-06 22:09:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:30,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2938587] [2023-11-06 22:09:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:30,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:30,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2938587] [2023-11-06 22:09:30,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2938587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:30,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:30,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885544161] [2023-11-06 22:09:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:30,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:30,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:30,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:30,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:30,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 363 [2023-11-06 22:09:30,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:30,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:30,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 363 [2023-11-06 22:09:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:33,086 INFO L124 PetriNetUnfolderBase]: 19971/27472 cut-off events. [2023-11-06 22:09:33,086 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:33,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53930 conditions, 27472 events. 19971/27472 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 166722 event pairs, 19971 based on Foata normal form. 0/24643 useless extension candidates. Maximal degree in co-relation 53926. Up to 26110 conditions per place. [2023-11-06 22:09:33,291 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 45 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-06 22:09:33,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 52 transitions, 210 flow [2023-11-06 22:09:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-11-06 22:09:33,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931129476584022 [2023-11-06 22:09:33,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-11-06 22:09:33,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-11-06 22:09:33,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:33,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-11-06 22:09:33,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:33,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:33,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:33,306 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 122 flow. Second operand 3 states and 537 transitions. [2023-11-06 22:09:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 52 transitions, 210 flow [2023-11-06 22:09:33,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 52 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:33,309 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 119 flow [2023-11-06 22:09:33,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-11-06 22:09:33,311 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -15 predicate places. [2023-11-06 22:09:33,311 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 119 flow [2023-11-06 22:09:33,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:33,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:33,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:09:33,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:33,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash 456628350, now seen corresponding path program 1 times [2023-11-06 22:09:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:33,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221790357] [2023-11-06 22:09:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:33,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:33,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221790357] [2023-11-06 22:09:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221790357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:33,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:33,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:33,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949923111] [2023-11-06 22:09:33,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:33,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:33,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:33,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-06 22:09:33,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:33,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:33,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-06 22:09:33,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:35,411 INFO L124 PetriNetUnfolderBase]: 19803/27208 cut-off events. [2023-11-06 22:09:35,411 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:35,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53419 conditions, 27208 events. 19803/27208 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 164928 event pairs, 19803 based on Foata normal form. 0/24463 useless extension candidates. Maximal degree in co-relation 53415. Up to 25862 conditions per place. [2023-11-06 22:09:35,593 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 43 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-06 22:09:35,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 50 transitions, 203 flow [2023-11-06 22:09:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-11-06 22:09:35,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719926538108356 [2023-11-06 22:09:35,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-11-06 22:09:35,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-11-06 22:09:35,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:35,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-11-06 22:09:35,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:35,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:35,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:35,608 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 119 flow. Second operand 3 states and 514 transitions. [2023-11-06 22:09:35,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 50 transitions, 203 flow [2023-11-06 22:09:35,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 50 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:35,612 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 116 flow [2023-11-06 22:09:35,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-11-06 22:09:35,613 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -16 predicate places. [2023-11-06 22:09:35,613 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 116 flow [2023-11-06 22:09:35,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:35,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:09:35,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:35,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash 456628349, now seen corresponding path program 1 times [2023-11-06 22:09:35,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:35,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215138641] [2023-11-06 22:09:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:35,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:35,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:35,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215138641] [2023-11-06 22:09:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215138641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:35,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:35,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:35,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043706232] [2023-11-06 22:09:35,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:35,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:35,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:35,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:35,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 363 [2023-11-06 22:09:35,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:35,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:35,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 363 [2023-11-06 22:09:35,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:37,809 INFO L124 PetriNetUnfolderBase]: 19635/26944 cut-off events. [2023-11-06 22:09:37,809 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:37,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52908 conditions, 26944 events. 19635/26944 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 163014 event pairs, 19635 based on Foata normal form. 0/24283 useless extension candidates. Maximal degree in co-relation 52904. Up to 25614 conditions per place. [2023-11-06 22:09:38,170 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 41 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-06 22:09:38,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 196 flow [2023-11-06 22:09:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-06 22:09:38,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48943985307621674 [2023-11-06 22:09:38,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-06 22:09:38,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-06 22:09:38,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:38,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-06 22:09:38,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:38,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:38,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:38,181 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 116 flow. Second operand 3 states and 533 transitions. [2023-11-06 22:09:38,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 196 flow [2023-11-06 22:09:38,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:38,184 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 113 flow [2023-11-06 22:09:38,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-11-06 22:09:38,185 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -17 predicate places. [2023-11-06 22:09:38,185 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 113 flow [2023-11-06 22:09:38,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:38,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:38,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:38,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:09:38,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:38,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash 733199478, now seen corresponding path program 1 times [2023-11-06 22:09:38,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:38,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085717625] [2023-11-06 22:09:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:38,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085717625] [2023-11-06 22:09:38,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085717625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:38,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:38,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:38,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087258414] [2023-11-06 22:09:38,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:38,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:38,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:38,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 363 [2023-11-06 22:09:38,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:38,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:38,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 363 [2023-11-06 22:09:38,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:40,339 INFO L124 PetriNetUnfolderBase]: 18864/25849 cut-off events. [2023-11-06 22:09:40,339 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50783 conditions, 25849 events. 18864/25849 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1258. Compared 154982 event pairs, 18864 based on Foata normal form. 0/23448 useless extension candidates. Maximal degree in co-relation 50779. Up to 24583 conditions per place. [2023-11-06 22:09:40,501 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 39 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 22:09:40,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 189 flow [2023-11-06 22:09:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-11-06 22:09:40,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2023-11-06 22:09:40,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-11-06 22:09:40,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-11-06 22:09:40,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:40,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-11-06 22:09:40,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:40,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:40,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:40,511 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 113 flow. Second operand 3 states and 531 transitions. [2023-11-06 22:09:40,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 189 flow [2023-11-06 22:09:40,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:40,514 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 110 flow [2023-11-06 22:09:40,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=61, PETRI_TRANSITIONS=46} [2023-11-06 22:09:40,515 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -18 predicate places. [2023-11-06 22:09:40,516 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 110 flow [2023-11-06 22:09:40,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:40,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:40,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:40,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:09:40,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:40,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 733199479, now seen corresponding path program 1 times [2023-11-06 22:09:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299220155] [2023-11-06 22:09:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:40,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:40,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:40,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299220155] [2023-11-06 22:09:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299220155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:40,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:40,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:09:40,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474128504] [2023-11-06 22:09:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:40,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-06 22:09:40,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:40,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:40,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-06 22:09:40,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:42,702 INFO L124 PetriNetUnfolderBase]: 18093/24754 cut-off events. [2023-11-06 22:09:42,703 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:42,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48658 conditions, 24754 events. 18093/24754 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 147227 event pairs, 18093 based on Foata normal form. 0/22613 useless extension candidates. Maximal degree in co-relation 48654. Up to 23552 conditions per place. [2023-11-06 22:09:42,848 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 37 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-06 22:09:42,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 182 flow [2023-11-06 22:09:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-11-06 22:09:42,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46648301193755737 [2023-11-06 22:09:42,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-11-06 22:09:42,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-11-06 22:09:42,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:42,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-11-06 22:09:42,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:42,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:42,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:42,858 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 110 flow. Second operand 3 states and 508 transitions. [2023-11-06 22:09:42,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 182 flow [2023-11-06 22:09:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:42,860 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 107 flow [2023-11-06 22:09:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-11-06 22:09:42,861 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -19 predicate places. [2023-11-06 22:09:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 107 flow [2023-11-06 22:09:42,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:42,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:42,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:42,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:09:42,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:42,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 230079372, now seen corresponding path program 1 times [2023-11-06 22:09:42,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687306322] [2023-11-06 22:09:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:42,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687306322] [2023-11-06 22:09:43,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687306322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:43,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:43,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:09:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182492356] [2023-11-06 22:09:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:43,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:09:43,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:09:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:09:43,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 363 [2023-11-06 22:09:43,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:43,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:43,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 363 [2023-11-06 22:09:43,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:45,298 INFO L124 PetriNetUnfolderBase]: 14253/19634 cut-off events. [2023-11-06 22:09:45,299 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:45,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38675 conditions, 19634 events. 14253/19634 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 114482 event pairs, 14253 based on Foata normal form. 0/18517 useless extension candidates. Maximal degree in co-relation 38671. Up to 18688 conditions per place. [2023-11-06 22:09:45,442 INFO L140 encePairwiseOnDemand]: 361/363 looper letters, 36 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-06 22:09:45,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 179 flow [2023-11-06 22:09:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-11-06 22:09:45,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44536271808999084 [2023-11-06 22:09:45,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-11-06 22:09:45,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-11-06 22:09:45,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:45,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-11-06 22:09:45,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:45,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:45,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:45,451 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 107 flow. Second operand 3 states and 485 transitions. [2023-11-06 22:09:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 179 flow [2023-11-06 22:09:45,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:45,454 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 106 flow [2023-11-06 22:09:45,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-11-06 22:09:45,457 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -19 predicate places. [2023-11-06 22:09:45,457 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 106 flow [2023-11-06 22:09:45,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:45,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:45,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:09:45,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:45,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 230079371, now seen corresponding path program 1 times [2023-11-06 22:09:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658476288] [2023-11-06 22:09:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658476288] [2023-11-06 22:09:45,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658476288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:45,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:09:45,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8493030] [2023-11-06 22:09:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:09:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:09:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:09:45,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 363 [2023-11-06 22:09:45,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 141.57142857142858) internal successors, (991), 7 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:45,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:45,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 363 [2023-11-06 22:09:45,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:47,180 INFO L124 PetriNetUnfolderBase]: 10413/14514 cut-off events. [2023-11-06 22:09:47,181 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:09:47,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28692 conditions, 14514 events. 10413/14514 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 82605 event pairs, 10413 based on Foata normal form. 0/14421 useless extension candidates. Maximal degree in co-relation 28688. Up to 13824 conditions per place. [2023-11-06 22:09:47,292 INFO L140 encePairwiseOnDemand]: 361/363 looper letters, 35 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-06 22:09:47,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 42 transitions, 176 flow [2023-11-06 22:09:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:09:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-11-06 22:09:47,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196510560146924 [2023-11-06 22:09:47,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-11-06 22:09:47,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-11-06 22:09:47,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:47,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-11-06 22:09:47,298 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) [2023-11-06 22:09:47,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:47,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:47,303 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 106 flow. Second operand 3 states and 457 transitions. [2023-11-06 22:09:47,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 42 transitions, 176 flow [2023-11-06 22:09:47,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 42 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:47,306 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 105 flow [2023-11-06 22:09:47,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-06 22:09:47,307 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -19 predicate places. [2023-11-06 22:09:47,308 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 105 flow [2023-11-06 22:09:47,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.57142857142858) internal successors, (991), 7 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:47,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:47,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:47,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:09:47,310 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:47,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:47,310 INFO L85 PathProgramCache]: Analyzing trace with hash -310325070, now seen corresponding path program 1 times [2023-11-06 22:09:47,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893685455] [2023-11-06 22:09:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:48,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893685455] [2023-11-06 22:09:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893685455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:48,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:09:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626388951] [2023-11-06 22:09:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:09:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:09:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:09:48,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 363 [2023-11-06 22:09:48,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 105 flow. Second operand has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:48,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:48,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 363 [2023-11-06 22:09:48,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:09:53,530 INFO L124 PetriNetUnfolderBase]: 53433/69727 cut-off events. [2023-11-06 22:09:53,531 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2023-11-06 22:09:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140753 conditions, 69727 events. 53433/69727 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 369443 event pairs, 13820 based on Foata normal form. 1/69728 useless extension candidates. Maximal degree in co-relation 140749. Up to 35415 conditions per place. [2023-11-06 22:09:53,915 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 116 selfloop transitions, 15 changer transitions 15/146 dead transitions. [2023-11-06 22:09:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 146 transitions, 624 flow [2023-11-06 22:09:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:09:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:09:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1101 transitions. [2023-11-06 22:09:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055096418732782 [2023-11-06 22:09:53,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1101 transitions. [2023-11-06 22:09:53,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1101 transitions. [2023-11-06 22:09:53,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:09:53,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1101 transitions. [2023-11-06 22:09:53,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.5) internal successors, (1101), 6 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:53,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:53,931 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:53,931 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 105 flow. Second operand 6 states and 1101 transitions. [2023-11-06 22:09:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 146 transitions, 624 flow [2023-11-06 22:09:53,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 146 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:09:53,935 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 205 flow [2023-11-06 22:09:53,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-11-06 22:09:53,936 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -12 predicate places. [2023-11-06 22:09:53,937 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 205 flow [2023-11-06 22:09:53,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:53,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:09:53,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:09:53,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-06 22:09:53,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1997810440, now seen corresponding path program 2 times [2023-11-06 22:09:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:53,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550902871] [2023-11-06 22:09:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:53,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:09:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550902871] [2023-11-06 22:09:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550902871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:54,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:54,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:09:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639381921] [2023-11-06 22:09:54,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:54,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:09:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:54,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:09:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:09:54,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 363 [2023-11-06 22:09:54,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 168.5) internal successors, (1348), 8 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:09:54,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:09:54,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 363 [2023-11-06 22:09:54,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand