./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573c853979782f78b60122afde2824ab47c3f9d6394b4ee74285d458320f7321 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:09:58,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:09:58,527 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:09:58,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:09:58,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:09:58,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:09:58,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:09:58,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:09:58,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:09:58,570 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:09:58,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:09:58,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:09:58,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:09:58,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:09:58,576 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:09:58,577 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:09:58,579 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:09:58,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:09:58,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:09:58,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:09:58,583 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:09:58,583 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:09:58,584 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:09:58,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:09:58,584 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:09:58,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:09:58,585 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:09:58,585 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:09:58,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:09:58,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:09:58,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:09:58,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:09:58,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:09:58,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:58,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:09:58,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:09:58,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:09:58,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:09:58,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:09:58,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:09:58,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:09:58,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:09:58,591 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_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573c853979782f78b60122afde2824ab47c3f9d6394b4ee74285d458320f7321 [2024-10-31 22:09:58,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:09:59,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:09:59,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:09:59,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:09:59,029 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:09:59,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i Unable to find full path for "g++" [2024-10-31 22:10:01,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:10:01,562 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:10:01,563 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i [2024-10-31 22:10:01,591 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/data/bf95cc115/e4a831af9bf04d3b97366c5419f16322/FLAGebcebd97a [2024-10-31 22:10:01,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/data/bf95cc115/e4a831af9bf04d3b97366c5419f16322 [2024-10-31 22:10:01,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:10:01,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:10:01,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:01,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:10:01,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:10:01,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:01" (1/1) ... [2024-10-31 22:10:01,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e723d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:01, skipping insertion in model container [2024-10-31 22:10:01,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:01" (1/1) ... [2024-10-31 22:10:01,699 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:10:02,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:02,779 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:10:02,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:02,947 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:10:02,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02 WrapperNode [2024-10-31 22:10:02,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:02,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:02,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:10:02,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:10:02,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:02,983 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,024 INFO L138 Inliner]: procedures = 372, calls = 99, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 249 [2024-10-31 22:10:03,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:03,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:10:03,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:10:03,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:10:03,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,052 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,079 INFO L175 MemorySlicer]: Split 97 memory accesses to 3 slices as follows [50, 18, 29]. 52 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 24 writes are split as follows [0, 2, 22]. [2024-10-31 22:10:03,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,101 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:10:03,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:10:03,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:10:03,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:10:03,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (1/1) ... [2024-10-31 22:10:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:10:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:03,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:10:03,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:10:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:10:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:10:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:10:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:10:03,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:10:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:10:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:10:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:10:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:10:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:10:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:10:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:10:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:10:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:10:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:10:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:10:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:10:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:10:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:10:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-31 22:10:03,242 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-31 22:10:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:10:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:10:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:10:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:10:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:10:03,245 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:10:03,483 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:10:03,486 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:10:04,291 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:10:04,291 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:10:04,893 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:10:04,893 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:10:04,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:04 BoogieIcfgContainer [2024-10-31 22:10:04,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:10:04,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:10:04,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:10:04,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:10:04,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:10:01" (1/3) ... [2024-10-31 22:10:04,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1544ec93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:04, skipping insertion in model container [2024-10-31 22:10:04,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:02" (2/3) ... [2024-10-31 22:10:04,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1544ec93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:04, skipping insertion in model container [2024-10-31 22:10:04,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:04" (3/3) ... [2024-10-31 22:10:04,906 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc-deref.i [2024-10-31 22:10:04,928 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:10:04,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2024-10-31 22:10:04,928 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:10:04,995 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:10:05,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 260 flow [2024-10-31 22:10:05,129 INFO L124 PetriNetUnfolderBase]: 1/127 cut-off events. [2024-10-31 22:10:05,129 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:10:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 127 events. 1/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 248 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-10-31 22:10:05,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 260 flow [2024-10-31 22:10:05,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 127 transitions, 257 flow [2024-10-31 22:10:05,153 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:10:05,161 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@35961ac6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:10:05,161 INFO L334 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2024-10-31 22:10:05,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:10:05,167 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:10:05,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:10:05,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:05,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:10:05,168 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:05,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 727376, now seen corresponding path program 1 times [2024-10-31 22:10:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:05,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503401688] [2024-10-31 22:10:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503401688] [2024-10-31 22:10:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503401688] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:05,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:05,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179762594] [2024-10-31 22:10:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:05,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:05,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:05,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 128 [2024-10-31 22:10:05,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 127 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:05,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:05,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 128 [2024-10-31 22:10:05,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:05,947 INFO L124 PetriNetUnfolderBase]: 64/324 cut-off events. [2024-10-31 22:10:05,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:10:05,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 324 events. 64/324 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1329 event pairs, 63 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 377. Up to 166 conditions per place. [2024-10-31 22:10:05,955 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 38 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-10-31 22:10:05,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 128 transitions, 339 flow [2024-10-31 22:10:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2024-10-31 22:10:05,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8020833333333334 [2024-10-31 22:10:05,976 INFO L175 Difference]: Start difference. First operand has 130 places, 127 transitions, 257 flow. Second operand 3 states and 308 transitions. [2024-10-31 22:10:05,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 128 transitions, 339 flow [2024-10-31 22:10:05,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 128 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:05,988 INFO L231 Difference]: Finished difference. Result has 132 places, 128 transitions, 268 flow [2024-10-31 22:10:05,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=132, PETRI_TRANSITIONS=128} [2024-10-31 22:10:05,995 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 2 predicate places. [2024-10-31 22:10:05,996 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 128 transitions, 268 flow [2024-10-31 22:10:05,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:05,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:05,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:10:05,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:10:05,998 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:05,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 22544959, now seen corresponding path program 1 times [2024-10-31 22:10:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296944708] [2024-10-31 22:10:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:06,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296944708] [2024-10-31 22:10:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296944708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:06,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894525416] [2024-10-31 22:10:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:06,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:06,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:10:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:06,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:10:06,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:06,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:10:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894525416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:10:06,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:10:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:10:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293633914] [2024-10-31 22:10:06,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:10:06,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:10:06,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 128 [2024-10-31 22:10:06,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 128 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:06,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:06,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 128 [2024-10-31 22:10:06,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:06,784 INFO L124 PetriNetUnfolderBase]: 64/327 cut-off events. [2024-10-31 22:10:06,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:10:06,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 327 events. 64/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1318 event pairs, 63 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 499. Up to 166 conditions per place. [2024-10-31 22:10:06,787 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 38 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-10-31 22:10:06,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 131 transitions, 366 flow [2024-10-31 22:10:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:10:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:10:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2024-10-31 22:10:06,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7552083333333334 [2024-10-31 22:10:06,792 INFO L175 Difference]: Start difference. First operand has 132 places, 128 transitions, 268 flow. Second operand 6 states and 580 transitions. [2024-10-31 22:10:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 131 transitions, 366 flow [2024-10-31 22:10:06,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 131 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:06,796 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 300 flow [2024-10-31 22:10:06,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2024-10-31 22:10:06,797 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 9 predicate places. [2024-10-31 22:10:06,798 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 300 flow [2024-10-31 22:10:06,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:06,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:06,799 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2024-10-31 22:10:06,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:10:06,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-31 22:10:07,000 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:07,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:07,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1618304272, now seen corresponding path program 2 times [2024-10-31 22:10:07,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:07,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100687397] [2024-10-31 22:10:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:07,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:10:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100687397] [2024-10-31 22:10:07,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100687397] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:07,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:07,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430779735] [2024-10-31 22:10:07,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:07,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:07,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 128 [2024-10-31 22:10:07,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 131 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:07,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:07,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 128 [2024-10-31 22:10:07,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:07,479 INFO L124 PetriNetUnfolderBase]: 64/317 cut-off events. [2024-10-31 22:10:07,479 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:10:07,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 317 events. 64/317 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1276 event pairs, 63 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 485. Up to 165 conditions per place. [2024-10-31 22:10:07,485 INFO L140 encePairwiseOnDemand]: 108/128 looper letters, 38 selfloop transitions, 10 changer transitions 0/121 dead transitions. [2024-10-31 22:10:07,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 121 transitions, 376 flow [2024-10-31 22:10:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2024-10-31 22:10:07,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.71875 [2024-10-31 22:10:07,487 INFO L175 Difference]: Start difference. First operand has 139 places, 131 transitions, 300 flow. Second operand 3 states and 276 transitions. [2024-10-31 22:10:07,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 121 transitions, 376 flow [2024-10-31 22:10:07,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 121 transitions, 362 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:07,495 INFO L231 Difference]: Finished difference. Result has 130 places, 121 transitions, 286 flow [2024-10-31 22:10:07,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=130, PETRI_TRANSITIONS=121} [2024-10-31 22:10:07,498 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 0 predicate places. [2024-10-31 22:10:07,498 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 121 transitions, 286 flow [2024-10-31 22:10:07,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:07,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:07,499 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2024-10-31 22:10:07,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:10:07,500 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:07,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1618304273, now seen corresponding path program 1 times [2024-10-31 22:10:07,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438079908] [2024-10-31 22:10:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438079908] [2024-10-31 22:10:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438079908] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38895832] [2024-10-31 22:10:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:07,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:07,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:10:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:07,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:10:07,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:07,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:10:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38895832] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:10:07,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:10:07,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-31 22:10:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791130793] [2024-10-31 22:10:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:10:07,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:10:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:10:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:10:07,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 128 [2024-10-31 22:10:07,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 121 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 90.07692307692308) internal successors, (1171), 13 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:07,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 128 [2024-10-31 22:10:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:08,139 INFO L124 PetriNetUnfolderBase]: 64/323 cut-off events. [2024-10-31 22:10:08,139 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-31 22:10:08,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 323 events. 64/323 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1265 event pairs, 63 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 490. Up to 166 conditions per place. [2024-10-31 22:10:08,142 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 38 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-10-31 22:10:08,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 127 transitions, 420 flow [2024-10-31 22:10:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:10:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:10:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2024-10-31 22:10:08,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7311197916666666 [2024-10-31 22:10:08,146 INFO L175 Difference]: Start difference. First operand has 130 places, 121 transitions, 286 flow. Second operand 12 states and 1123 transitions. [2024-10-31 22:10:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 127 transitions, 420 flow [2024-10-31 22:10:08,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 127 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:08,151 INFO L231 Difference]: Finished difference. Result has 145 places, 127 transitions, 350 flow [2024-10-31 22:10:08,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=145, PETRI_TRANSITIONS=127} [2024-10-31 22:10:08,152 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 15 predicate places. [2024-10-31 22:10:08,152 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 350 flow [2024-10-31 22:10:08,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.07692307692308) internal successors, (1171), 13 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:08,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:08,153 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2024-10-31 22:10:08,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:10:08,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c295ab7-53e5-49ed-a441-5e9ce7f7ba31/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-31 22:10:08,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:08,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash -274137423, now seen corresponding path program 2 times [2024-10-31 22:10:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469608506] [2024-10-31 22:10:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:08,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:08,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469608506] [2024-10-31 22:10:08,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469608506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:08,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:08,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176950313] [2024-10-31 22:10:08,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:08,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:08,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:08,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 128 [2024-10-31 22:10:08,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 127 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:08,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:08,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 128 [2024-10-31 22:10:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:09,054 INFO L124 PetriNetUnfolderBase]: 64/313 cut-off events. [2024-10-31 22:10:09,054 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-31 22:10:09,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 313 events. 64/313 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1255 event pairs, 63 based on Foata normal form. 5/247 useless extension candidates. Maximal degree in co-relation 476. Up to 171 conditions per place. [2024-10-31 22:10:09,057 INFO L140 encePairwiseOnDemand]: 108/128 looper letters, 39 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-10-31 22:10:09,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 117 transitions, 428 flow [2024-10-31 22:10:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2024-10-31 22:10:09,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7447916666666666 [2024-10-31 22:10:09,059 INFO L175 Difference]: Start difference. First operand has 145 places, 127 transitions, 350 flow. Second operand 3 states and 286 transitions. [2024-10-31 22:10:09,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 117 transitions, 428 flow [2024-10-31 22:10:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 117 transitions, 380 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-31 22:10:09,068 INFO L231 Difference]: Finished difference. Result has 132 places, 117 transitions, 302 flow [2024-10-31 22:10:09,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=132, PETRI_TRANSITIONS=117} [2024-10-31 22:10:09,069 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 2 predicate places. [2024-10-31 22:10:09,071 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 117 transitions, 302 flow [2024-10-31 22:10:09,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:09,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:09,072 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2024-10-31 22:10:09,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:10:09,072 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:09,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1453035888, now seen corresponding path program 1 times [2024-10-31 22:10:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073120529] [2024-10-31 22:10:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:09,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073120529] [2024-10-31 22:10:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073120529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:09,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217838654] [2024-10-31 22:10:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:09,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:10:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:10:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:10:09,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 128 [2024-10-31 22:10:09,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 117 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:09,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:09,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 128 [2024-10-31 22:10:09,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:10,068 INFO L124 PetriNetUnfolderBase]: 73/327 cut-off events. [2024-10-31 22:10:10,069 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:10:10,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 327 events. 73/327 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1339 event pairs, 72 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 524. Up to 199 conditions per place. [2024-10-31 22:10:10,072 INFO L140 encePairwiseOnDemand]: 119/128 looper letters, 54 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2024-10-31 22:10:10,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 109 transitions, 396 flow [2024-10-31 22:10:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-10-31 22:10:10,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7239583333333334 [2024-10-31 22:10:10,075 INFO L175 Difference]: Start difference. First operand has 132 places, 117 transitions, 302 flow. Second operand 3 states and 278 transitions. [2024-10-31 22:10:10,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 109 transitions, 396 flow [2024-10-31 22:10:10,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 109 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:10,079 INFO L231 Difference]: Finished difference. Result has 124 places, 109 transitions, 268 flow [2024-10-31 22:10:10,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=124, PETRI_TRANSITIONS=109} [2024-10-31 22:10:10,081 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -6 predicate places. [2024-10-31 22:10:10,082 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 109 transitions, 268 flow [2024-10-31 22:10:10,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:10,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:10,083 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2024-10-31 22:10:10,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:10:10,084 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:10,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1453035887, now seen corresponding path program 1 times [2024-10-31 22:10:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285167310] [2024-10-31 22:10:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285167310] [2024-10-31 22:10:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285167310] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652356420] [2024-10-31 22:10:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:10,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:10,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 128 [2024-10-31 22:10:10,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 109 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:10,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:10,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 128 [2024-10-31 22:10:10,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:11,061 INFO L124 PetriNetUnfolderBase]: 73/321 cut-off events. [2024-10-31 22:10:11,061 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-31 22:10:11,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 321 events. 73/321 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1306 event pairs, 63 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 537. Up to 158 conditions per place. [2024-10-31 22:10:11,065 INFO L140 encePairwiseOnDemand]: 112/128 looper letters, 44 selfloop transitions, 12 changer transitions 3/114 dead transitions. [2024-10-31 22:10:11,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 396 flow [2024-10-31 22:10:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2024-10-31 22:10:11,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6765625 [2024-10-31 22:10:11,068 INFO L175 Difference]: Start difference. First operand has 124 places, 109 transitions, 268 flow. Second operand 5 states and 433 transitions. [2024-10-31 22:10:11,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 396 flow [2024-10-31 22:10:11,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 114 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:11,073 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 283 flow [2024-10-31 22:10:11,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2024-10-31 22:10:11,075 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -7 predicate places. [2024-10-31 22:10:11,075 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 283 flow [2024-10-31 22:10:11,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:11,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:11,076 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:11,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:10:11,076 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:11,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1859092806, now seen corresponding path program 1 times [2024-10-31 22:10:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025998783] [2024-10-31 22:10:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025998783] [2024-10-31 22:10:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025998783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:11,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:10:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378451655] [2024-10-31 22:10:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:11,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:10:12,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 128 [2024-10-31 22:10:12,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 283 flow. Second operand has 7 states, 7 states have (on average 63.42857142857143) internal successors, (444), 7 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:12,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:12,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 128 [2024-10-31 22:10:12,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:12,455 INFO L124 PetriNetUnfolderBase]: 64/289 cut-off events. [2024-10-31 22:10:12,455 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:10:12,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 289 events. 64/289 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1122 event pairs, 63 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 518. Up to 166 conditions per place. [2024-10-31 22:10:12,457 INFO L140 encePairwiseOnDemand]: 107/128 looper letters, 45 selfloop transitions, 16 changer transitions 0/100 dead transitions. [2024-10-31 22:10:12,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 100 transitions, 395 flow [2024-10-31 22:10:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:10:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:10:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 552 transitions. [2024-10-31 22:10:12,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2024-10-31 22:10:12,460 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 283 flow. Second operand 8 states and 552 transitions. [2024-10-31 22:10:12,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 100 transitions, 395 flow [2024-10-31 22:10:12,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 371 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:12,464 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 281 flow [2024-10-31 22:10:12,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=121, PETRI_TRANSITIONS=100} [2024-10-31 22:10:12,465 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -9 predicate places. [2024-10-31 22:10:12,465 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 281 flow [2024-10-31 22:10:12,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.42857142857143) internal successors, (444), 7 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:12,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:12,466 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:12,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:10:12,467 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:12,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1859092807, now seen corresponding path program 1 times [2024-10-31 22:10:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:12,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637615522] [2024-10-31 22:10:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637615522] [2024-10-31 22:10:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637615522] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:13,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:10:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437495334] [2024-10-31 22:10:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:13,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:10:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:10:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:10:13,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 128 [2024-10-31 22:10:13,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 100 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:13,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:13,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 128 [2024-10-31 22:10:13,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:14,150 INFO L124 PetriNetUnfolderBase]: 64/287 cut-off events. [2024-10-31 22:10:14,151 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-31 22:10:14,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 287 events. 64/287 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1126 event pairs, 63 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 506. Up to 172 conditions per place. [2024-10-31 22:10:14,153 INFO L140 encePairwiseOnDemand]: 115/128 looper letters, 44 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-10-31 22:10:14,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 98 transitions, 387 flow [2024-10-31 22:10:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 544 transitions. [2024-10-31 22:10:14,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-10-31 22:10:14,156 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 281 flow. Second operand 7 states and 544 transitions. [2024-10-31 22:10:14,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 98 transitions, 387 flow [2024-10-31 22:10:14,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 98 transitions, 355 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-31 22:10:14,160 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 267 flow [2024-10-31 22:10:14,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2024-10-31 22:10:14,161 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -12 predicate places. [2024-10-31 22:10:14,161 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 267 flow [2024-10-31 22:10:14,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:14,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:14,162 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:14,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:10:14,162 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:14,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash -118183534, now seen corresponding path program 1 times [2024-10-31 22:10:14,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:14,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006779061] [2024-10-31 22:10:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:14,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006779061] [2024-10-31 22:10:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006779061] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:14,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:14,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930984785] [2024-10-31 22:10:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:14,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:14,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 128 [2024-10-31 22:10:14,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:14,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:14,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 128 [2024-10-31 22:10:14,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:14,995 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-10-31 22:10:14,995 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-31 22:10:14,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 286 events. 64/286 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1124 event pairs, 63 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 497. Up to 171 conditions per place. [2024-10-31 22:10:14,999 INFO L140 encePairwiseOnDemand]: 116/128 looper letters, 41 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2024-10-31 22:10:15,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 97 transitions, 369 flow [2024-10-31 22:10:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2024-10-31 22:10:15,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-10-31 22:10:15,003 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 267 flow. Second operand 5 states and 418 transitions. [2024-10-31 22:10:15,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 97 transitions, 369 flow [2024-10-31 22:10:15,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 97 transitions, 347 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:10:15,006 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 265 flow [2024-10-31 22:10:15,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-10-31 22:10:15,007 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -15 predicate places. [2024-10-31 22:10:15,009 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 265 flow [2024-10-31 22:10:15,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:15,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:15,010 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:15,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:10:15,010 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:15,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash -118183535, now seen corresponding path program 1 times [2024-10-31 22:10:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612053439] [2024-10-31 22:10:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612053439] [2024-10-31 22:10:15,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612053439] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:15,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965695013] [2024-10-31 22:10:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:15,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:15,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 128 [2024-10-31 22:10:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:15,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:15,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 128 [2024-10-31 22:10:15,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:15,661 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-10-31 22:10:15,662 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:10:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 285 events. 64/285 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1132 event pairs, 63 based on Foata normal form. 1/239 useless extension candidates. Maximal degree in co-relation 501. Up to 171 conditions per place. [2024-10-31 22:10:15,664 INFO L140 encePairwiseOnDemand]: 116/128 looper letters, 46 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-10-31 22:10:15,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 96 transitions, 377 flow [2024-10-31 22:10:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2024-10-31 22:10:15,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-10-31 22:10:15,666 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 265 flow. Second operand 5 states and 398 transitions. [2024-10-31 22:10:15,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 96 transitions, 377 flow [2024-10-31 22:10:15,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:15,670 INFO L231 Difference]: Finished difference. Result has 114 places, 96 transitions, 263 flow [2024-10-31 22:10:15,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=114, PETRI_TRANSITIONS=96} [2024-10-31 22:10:15,670 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -16 predicate places. [2024-10-31 22:10:15,671 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 96 transitions, 263 flow [2024-10-31 22:10:15,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:15,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:15,671 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:15,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:10:15,672 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:15,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1068289777, now seen corresponding path program 1 times [2024-10-31 22:10:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:15,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898112883] [2024-10-31 22:10:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:15,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:16,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898112883] [2024-10-31 22:10:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898112883] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:10:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405394574] [2024-10-31 22:10:16,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:16,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:10:17,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 128 [2024-10-31 22:10:17,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 96 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:17,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:17,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 128 [2024-10-31 22:10:17,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:17,336 INFO L124 PetriNetUnfolderBase]: 73/309 cut-off events. [2024-10-31 22:10:17,336 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-31 22:10:17,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 309 events. 73/309 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1282 event pairs, 63 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 536. Up to 158 conditions per place. [2024-10-31 22:10:17,338 INFO L140 encePairwiseOnDemand]: 113/128 looper letters, 44 selfloop transitions, 12 changer transitions 3/102 dead transitions. [2024-10-31 22:10:17,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 393 flow [2024-10-31 22:10:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 387 transitions. [2024-10-31 22:10:17,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6046875 [2024-10-31 22:10:17,341 INFO L175 Difference]: Start difference. First operand has 114 places, 96 transitions, 263 flow. Second operand 5 states and 387 transitions. [2024-10-31 22:10:17,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 393 flow [2024-10-31 22:10:17,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 102 transitions, 371 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:17,344 INFO L231 Difference]: Finished difference. Result has 111 places, 93 transitions, 259 flow [2024-10-31 22:10:17,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2024-10-31 22:10:17,345 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -19 predicate places. [2024-10-31 22:10:17,345 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 259 flow [2024-10-31 22:10:17,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:17,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:17,346 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:17,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:10:17,346 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:17,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -281122203, now seen corresponding path program 1 times [2024-10-31 22:10:17,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028072852] [2024-10-31 22:10:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:17,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028072852] [2024-10-31 22:10:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028072852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:18,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:18,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:10:18,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53645172] [2024-10-31 22:10:18,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:18,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:10:19,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 128 [2024-10-31 22:10:19,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:19,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 128 [2024-10-31 22:10:19,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:19,477 INFO L124 PetriNetUnfolderBase]: 64/278 cut-off events. [2024-10-31 22:10:19,477 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-31 22:10:19,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 278 events. 64/278 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1113 event pairs, 54 based on Foata normal form. 2/237 useless extension candidates. Maximal degree in co-relation 502. Up to 132 conditions per place. [2024-10-31 22:10:19,479 INFO L140 encePairwiseOnDemand]: 110/128 looper letters, 48 selfloop transitions, 14 changer transitions 3/98 dead transitions. [2024-10-31 22:10:19,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 98 transitions, 399 flow [2024-10-31 22:10:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-10-31 22:10:19,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5033482142857143 [2024-10-31 22:10:19,482 INFO L175 Difference]: Start difference. First operand has 111 places, 93 transitions, 259 flow. Second operand 7 states and 451 transitions. [2024-10-31 22:10:19,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 98 transitions, 399 flow [2024-10-31 22:10:19,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 375 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:19,485 INFO L231 Difference]: Finished difference. Result has 109 places, 89 transitions, 255 flow [2024-10-31 22:10:19,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2024-10-31 22:10:19,487 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -21 predicate places. [2024-10-31 22:10:19,487 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 255 flow [2024-10-31 22:10:19,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:19,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:19,488 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:19,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:10:19,488 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:19,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash -281122204, now seen corresponding path program 1 times [2024-10-31 22:10:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:19,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249608202] [2024-10-31 22:10:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249608202] [2024-10-31 22:10:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249608202] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:19,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:19,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:10:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435988255] [2024-10-31 22:10:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:19,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:10:20,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 128 [2024-10-31 22:10:20,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 89 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 64.71428571428571) internal successors, (453), 7 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:20,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:20,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 128 [2024-10-31 22:10:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:20,893 INFO L124 PetriNetUnfolderBase]: 64/276 cut-off events. [2024-10-31 22:10:20,893 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:10:20,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 276 events. 64/276 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1114 event pairs, 54 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 506. Up to 130 conditions per place. [2024-10-31 22:10:20,895 INFO L140 encePairwiseOnDemand]: 109/128 looper letters, 48 selfloop transitions, 17 changer transitions 3/96 dead transitions. [2024-10-31 22:10:20,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 96 transitions, 405 flow [2024-10-31 22:10:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:10:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:10:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 556 transitions. [2024-10-31 22:10:20,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54296875 [2024-10-31 22:10:20,898 INFO L175 Difference]: Start difference. First operand has 109 places, 89 transitions, 255 flow. Second operand 8 states and 556 transitions. [2024-10-31 22:10:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 96 transitions, 405 flow [2024-10-31 22:10:20,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 96 transitions, 377 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:10:20,901 INFO L231 Difference]: Finished difference. Result has 108 places, 87 transitions, 257 flow [2024-10-31 22:10:20,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=108, PETRI_TRANSITIONS=87} [2024-10-31 22:10:20,902 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -22 predicate places. [2024-10-31 22:10:20,903 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 87 transitions, 257 flow [2024-10-31 22:10:20,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.71428571428571) internal successors, (453), 7 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:20,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:20,904 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:20,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:10:20,904 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:20,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 424527226, now seen corresponding path program 1 times [2024-10-31 22:10:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:20,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643102769] [2024-10-31 22:10:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:21,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:21,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643102769] [2024-10-31 22:10:21,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643102769] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:21,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:21,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:21,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447649947] [2024-10-31 22:10:21,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:21,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:21,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:21,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 128 [2024-10-31 22:10:21,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 87 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:21,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:21,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 128 [2024-10-31 22:10:21,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:21,774 INFO L124 PetriNetUnfolderBase]: 64/275 cut-off events. [2024-10-31 22:10:21,775 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-10-31 22:10:21,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 275 events. 64/275 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1116 event pairs, 63 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 500. Up to 170 conditions per place. [2024-10-31 22:10:21,777 INFO L140 encePairwiseOnDemand]: 116/128 looper letters, 40 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-10-31 22:10:21,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 86 transitions, 357 flow [2024-10-31 22:10:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2024-10-31 22:10:21,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6515625 [2024-10-31 22:10:21,779 INFO L175 Difference]: Start difference. First operand has 108 places, 87 transitions, 257 flow. Second operand 5 states and 417 transitions. [2024-10-31 22:10:21,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 86 transitions, 357 flow [2024-10-31 22:10:21,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 86 transitions, 323 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-31 22:10:21,782 INFO L231 Difference]: Finished difference. Result has 104 places, 86 transitions, 243 flow [2024-10-31 22:10:21,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=104, PETRI_TRANSITIONS=86} [2024-10-31 22:10:21,784 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -26 predicate places. [2024-10-31 22:10:21,785 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 86 transitions, 243 flow [2024-10-31 22:10:21,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:21,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:21,786 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:21,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:10:21,786 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:21,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 424527225, now seen corresponding path program 1 times [2024-10-31 22:10:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929005934] [2024-10-31 22:10:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929005934] [2024-10-31 22:10:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929005934] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463487075] [2024-10-31 22:10:21,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:21,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:21,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:22,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 128 [2024-10-31 22:10:22,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 86 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:22,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:22,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 128 [2024-10-31 22:10:22,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:22,555 INFO L124 PetriNetUnfolderBase]: 64/274 cut-off events. [2024-10-31 22:10:22,556 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:10:22,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 274 events. 64/274 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1108 event pairs, 63 based on Foata normal form. 1/232 useless extension candidates. Maximal degree in co-relation 489. Up to 170 conditions per place. [2024-10-31 22:10:22,558 INFO L140 encePairwiseOnDemand]: 116/128 looper letters, 45 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-10-31 22:10:22,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 85 transitions, 353 flow [2024-10-31 22:10:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 397 transitions. [2024-10-31 22:10:22,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6203125 [2024-10-31 22:10:22,561 INFO L175 Difference]: Start difference. First operand has 104 places, 86 transitions, 243 flow. Second operand 5 states and 397 transitions. [2024-10-31 22:10:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 85 transitions, 353 flow [2024-10-31 22:10:22,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 85 transitions, 331 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:22,564 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 241 flow [2024-10-31 22:10:22,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2024-10-31 22:10:22,565 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -27 predicate places. [2024-10-31 22:10:22,565 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 241 flow [2024-10-31 22:10:22,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:22,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:22,566 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:22,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 22:10:22,566 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:10:22,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1963632937, now seen corresponding path program 1 times [2024-10-31 22:10:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056675504] [2024-10-31 22:10:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:10:24,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056675504] [2024-10-31 22:10:24,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056675504] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:24,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:24,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-10-31 22:10:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649514410] [2024-10-31 22:10:24,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:24,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:10:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:10:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:10:28,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 128 [2024-10-31 22:10:28,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 241 flow. Second operand has 16 states, 16 states have (on average 45.5625) internal successors, (729), 16 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:28,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:28,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 128 [2024-10-31 22:10:28,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand