./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/pthread/queue_ok_longer.i', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G valid-free) )\nCHECK( init(main()), LTL(G valid-deref) )\nCHECK( init(main()), LTL(G valid-memtrack) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', 'f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/queue_ok_longer.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:05:30,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:05:30,478 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:05:30,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:05:30,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:05:30,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:05:30,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:05:30,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:05:30,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:05:30,519 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:05:30,519 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:05:30,519 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:05:30,519 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:05:30,520 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:05:30,520 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:05:30,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:05:30,520 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:05:30,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:05:30,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:05:30,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:05:30,522 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:05:30,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:05:30,523 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:05:30,523 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux 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 -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2024-11-07 19:05:30,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:05:30,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:05:30,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:05:30,821 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:05:30,822 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:05:30,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue_ok_longer.i [2024-11-07 19:05:32,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:05:32,400 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:05:32,402 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i [2024-11-07 19:05:32,427 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2bea535c2/51fc5d6125fb4786afbf50089b00aa6c/FLAGddf2ba691 [2024-11-07 19:05:32,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2bea535c2/51fc5d6125fb4786afbf50089b00aa6c [2024-11-07 19:05:32,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:05:32,453 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:05:32,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:05:32,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:05:32,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:05:32,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:05:32" (1/1) ... [2024-11-07 19:05:32,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7f5ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:32, skipping insertion in model container [2024-11-07 19:05:32,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:05:32" (1/1) ... [2024-11-07 19:05:32,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:05:32,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:05:32,904 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:05:32,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:05:33,106 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:05:33,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33 WrapperNode [2024-11-07 19:05:33,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:05:33,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:05:33,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:05:33,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:05:33,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,240 INFO L138 Inliner]: procedures = 274, calls = 854, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1001 [2024-11-07 19:05:33,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:05:33,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:05:33,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:05:33,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:05:33,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,263 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,304 INFO L175 MemorySlicer]: Split 835 memory accesses to 4 slices as follows [2, 5, 402, 426]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 5, 400, 403]. The 11 writes are split as follows [0, 0, 1, 10]. [2024-11-07 19:05:33,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:05:33,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:05:33,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:05:33,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:05:33,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (1/1) ... [2024-11-07 19:05:33,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:05:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:05:33,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 19:05:33,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-07 19:05:33,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-07 19:05:33,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-07 19:05:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-07 19:05:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:05:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:05:33,441 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 19:05:33,574 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:05:33,576 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:05:34,865 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:05:34,865 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:05:41,034 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:05:41,035 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-07 19:05:41,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:05:41 BoogieIcfgContainer [2024-11-07 19:05:41,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:05:41,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:05:41,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:05:41,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:05:41,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:05:32" (1/3) ... [2024-11-07 19:05:41,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32806735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:05:41, skipping insertion in model container [2024-11-07 19:05:41,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:05:33" (2/3) ... [2024-11-07 19:05:41,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32806735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:05:41, skipping insertion in model container [2024-11-07 19:05:41,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:05:41" (3/3) ... [2024-11-07 19:05:41,045 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2024-11-07 19:05:41,059 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:05:41,060 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2024-11-07 19:05:41,060 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:05:41,173 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:05:41,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 272 flow [2024-11-07 19:05:41,303 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2024-11-07 19:05:41,307 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:05:41,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 405 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2024-11-07 19:05:41,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 272 flow [2024-11-07 19:05:41,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2024-11-07 19:05:41,329 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:05:41,346 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;@6ea31159, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:05:41,347 INFO L334 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2024-11-07 19:05:41,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:05:41,384 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-07 19:05:41,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:05:41,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:41,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-07 19:05:41,386 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:41,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 69449, now seen corresponding path program 1 times [2024-11-07 19:05:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:41,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108621573] [2024-11-07 19:05:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:42,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:42,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108621573] [2024-11-07 19:05:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108621573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:42,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:42,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:05:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552564760] [2024-11-07 19:05:42,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:42,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:05:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:05:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:05:42,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-07 19:05:42,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:42,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:42,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-07 19:05:42,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:43,071 INFO L124 PetriNetUnfolderBase]: 1089/2984 cut-off events. [2024-11-07 19:05:43,072 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-07 19:05:43,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2984 events. 1089/2984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23575 event pairs, 839 based on Foata normal form. 68/2109 useless extension candidates. Maximal degree in co-relation 4570. Up to 1689 conditions per place. [2024-11-07 19:05:43,101 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-07 19:05:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 334 flow [2024-11-07 19:05:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:05:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:05:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-11-07 19:05:43,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6873385012919897 [2024-11-07 19:05:43,119 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 264 flow. Second operand 3 states and 266 transitions. [2024-11-07 19:05:43,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 334 flow [2024-11-07 19:05:43,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:05:43,131 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2024-11-07 19:05:43,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2024-11-07 19:05:43,137 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -10 predicate places. [2024-11-07 19:05:43,137 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2024-11-07 19:05:43,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:43,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:43,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-07 19:05:43,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:05:43,139 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:43,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 69450, now seen corresponding path program 1 times [2024-11-07 19:05:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962549035] [2024-11-07 19:05:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962549035] [2024-11-07 19:05:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962549035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:43,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:05:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77151836] [2024-11-07 19:05:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:43,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:05:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:05:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:05:43,904 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-07 19:05:43,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:43,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:43,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-07 19:05:43,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:44,388 INFO L124 PetriNetUnfolderBase]: 1089/2981 cut-off events. [2024-11-07 19:05:44,388 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-07 19:05:44,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2981 events. 1089/2981 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23571 event pairs, 839 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4679. Up to 1689 conditions per place. [2024-11-07 19:05:44,412 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-07 19:05:44,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 324 flow [2024-11-07 19:05:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:05:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:05:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-07 19:05:44,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795865633074936 [2024-11-07 19:05:44,415 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 263 transitions. [2024-11-07 19:05:44,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 324 flow [2024-11-07 19:05:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:05:44,421 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 230 flow [2024-11-07 19:05:44,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-11-07 19:05:44,422 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2024-11-07 19:05:44,423 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 230 flow [2024-11-07 19:05:44,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:44,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:44,424 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:05:44,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:05:44,424 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:44,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2071095474, now seen corresponding path program 1 times [2024-11-07 19:05:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:44,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924078036] [2024-11-07 19:05:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:44,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924078036] [2024-11-07 19:05:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924078036] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:44,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:44,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:44,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859155268] [2024-11-07 19:05:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:44,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:05:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:05:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:05:44,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-07 19:05:44,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:44,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:44,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-07 19:05:44,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:45,341 INFO L124 PetriNetUnfolderBase]: 1089/2979 cut-off events. [2024-11-07 19:05:45,342 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-07 19:05:45,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2979 events. 1089/2979 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23545 event pairs, 839 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 4677. Up to 1688 conditions per place. [2024-11-07 19:05:45,363 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-07 19:05:45,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 320 flow [2024-11-07 19:05:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:05:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:05:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-07 19:05:45,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-07 19:05:45,366 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 230 flow. Second operand 4 states and 337 transitions. [2024-11-07 19:05:45,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 320 flow [2024-11-07 19:05:45,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:05:45,369 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 228 flow [2024-11-07 19:05:45,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-11-07 19:05:45,370 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -14 predicate places. [2024-11-07 19:05:45,370 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 228 flow [2024-11-07 19:05:45,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:45,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:45,370 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:05:45,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:05:45,371 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:45,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2071095475, now seen corresponding path program 1 times [2024-11-07 19:05:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300820403] [2024-11-07 19:05:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:45,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:45,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300820403] [2024-11-07 19:05:45,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300820403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:45,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:45,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:45,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764588093] [2024-11-07 19:05:45,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:45,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:05:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:05:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:05:46,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-07 19:05:46,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:46,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:46,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-07 19:05:46,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:46,471 INFO L124 PetriNetUnfolderBase]: 1089/2977 cut-off events. [2024-11-07 19:05:46,472 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-07 19:05:46,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 2977 events. 1089/2977 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23568 event pairs, 839 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 4672. Up to 1688 conditions per place. [2024-11-07 19:05:46,493 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-11-07 19:05:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 318 flow [2024-11-07 19:05:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:05:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:05:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-07 19:05:46,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-07 19:05:46,495 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 228 flow. Second operand 4 states and 337 transitions. [2024-11-07 19:05:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 318 flow [2024-11-07 19:05:46,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:46,498 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 224 flow [2024-11-07 19:05:46,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-07 19:05:46,499 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-11-07 19:05:46,499 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 224 flow [2024-11-07 19:05:46,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:46,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:46,500 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:46,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:05:46,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:46,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash 902343804, now seen corresponding path program 1 times [2024-11-07 19:05:46,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:46,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421313398] [2024-11-07 19:05:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:46,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421313398] [2024-11-07 19:05:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421313398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:46,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880511016] [2024-11-07 19:05:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:46,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:05:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:05:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:05:47,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-11-07 19:05:47,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:47,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:47,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-11-07 19:05:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:47,510 INFO L124 PetriNetUnfolderBase]: 1046/2622 cut-off events. [2024-11-07 19:05:47,510 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-07 19:05:47,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 2622 events. 1046/2622 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19408 event pairs, 426 based on Foata normal form. 120/2116 useless extension candidates. Maximal degree in co-relation 4272. Up to 882 conditions per place. [2024-11-07 19:05:47,530 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-07 19:05:47,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 395 flow [2024-11-07 19:05:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:05:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:05:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-11-07 19:05:47,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-11-07 19:05:47,534 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 4 states and 342 transitions. [2024-11-07 19:05:47,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 395 flow [2024-11-07 19:05:47,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:47,538 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 208 flow [2024-11-07 19:05:47,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-11-07 19:05:47,541 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-07 19:05:47,541 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 208 flow [2024-11-07 19:05:47,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:47,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:47,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:47,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:05:47,542 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:47,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 902343805, now seen corresponding path program 1 times [2024-11-07 19:05:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792035607] [2024-11-07 19:05:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792035607] [2024-11-07 19:05:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792035607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:48,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:48,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:48,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433954946] [2024-11-07 19:05:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:48,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:05:48,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:05:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:05:48,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 129 [2024-11-07 19:05:48,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:48,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:48,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 129 [2024-11-07 19:05:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:48,558 INFO L124 PetriNetUnfolderBase]: 1046/2354 cut-off events. [2024-11-07 19:05:48,558 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-07 19:05:48,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 2354 events. 1046/2354 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15823 event pairs, 426 based on Foata normal form. 120/2000 useless extension candidates. Maximal degree in co-relation 1953. Up to 882 conditions per place. [2024-11-07 19:05:48,575 INFO L140 encePairwiseOnDemand]: 119/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2024-11-07 19:05:48,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 381 flow [2024-11-07 19:05:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:05:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:05:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 345 transitions. [2024-11-07 19:05:48,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-11-07 19:05:48,579 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 208 flow. Second operand 4 states and 345 transitions. [2024-11-07 19:05:48,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 381 flow [2024-11-07 19:05:48,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 115 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:48,583 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 194 flow [2024-11-07 19:05:48,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-11-07 19:05:48,584 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -31 predicate places. [2024-11-07 19:05:48,585 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 194 flow [2024-11-07 19:05:48,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:48,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:48,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:48,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:05:48,586 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:48,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2092110920, now seen corresponding path program 1 times [2024-11-07 19:05:48,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:48,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029765131] [2024-11-07 19:05:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:49,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029765131] [2024-11-07 19:05:49,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029765131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:49,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:49,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 19:05:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559066593] [2024-11-07 19:05:49,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:49,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:05:49,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:05:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:05:50,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 129 [2024-11-07 19:05:50,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:50,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:50,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 129 [2024-11-07 19:05:50,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:51,041 INFO L124 PetriNetUnfolderBase]: 2065/4255 cut-off events. [2024-11-07 19:05:51,042 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-07 19:05:51,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7679 conditions, 4255 events. 2065/4255 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29549 event pairs, 289 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 2484. Up to 2157 conditions per place. [2024-11-07 19:05:51,064 INFO L140 encePairwiseOnDemand]: 119/129 looper letters, 131 selfloop transitions, 12 changer transitions 0/182 dead transitions. [2024-11-07 19:05:51,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 182 transitions, 667 flow [2024-11-07 19:05:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:05:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:05:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2024-11-07 19:05:51,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-11-07 19:05:51,066 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 194 flow. Second operand 8 states and 609 transitions. [2024-11-07 19:05:51,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 182 transitions, 667 flow [2024-11-07 19:05:51,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 659 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:51,077 INFO L231 Difference]: Finished difference. Result has 99 places, 102 transitions, 264 flow [2024-11-07 19:05:51,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=99, PETRI_TRANSITIONS=102} [2024-11-07 19:05:51,079 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-11-07 19:05:51,079 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 102 transitions, 264 flow [2024-11-07 19:05:51,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:51,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:51,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:51,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:05:51,079 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:51,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1088727253, now seen corresponding path program 1 times [2024-11-07 19:05:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:51,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11090513] [2024-11-07 19:05:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:51,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11090513] [2024-11-07 19:05:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11090513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:51,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:51,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922480625] [2024-11-07 19:05:51,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:51,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:05:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:05:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:05:51,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-07 19:05:51,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 102 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:51,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:51,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-07 19:05:51,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:51,556 INFO L124 PetriNetUnfolderBase]: 692/1652 cut-off events. [2024-11-07 19:05:51,557 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-07 19:05:51,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3115 conditions, 1652 events. 692/1652 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10240 event pairs, 446 based on Foata normal form. 43/1432 useless extension candidates. Maximal degree in co-relation 3072. Up to 693 conditions per place. [2024-11-07 19:05:51,565 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 59 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-07 19:05:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 393 flow [2024-11-07 19:05:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:05:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:05:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-07 19:05:51,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7260981912144703 [2024-11-07 19:05:51,569 INFO L175 Difference]: Start difference. First operand has 99 places, 102 transitions, 264 flow. Second operand 3 states and 281 transitions. [2024-11-07 19:05:51,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 393 flow [2024-11-07 19:05:51,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 387 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:51,573 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2024-11-07 19:05:51,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-11-07 19:05:51,573 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-07 19:05:51,573 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2024-11-07 19:05:51,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:51,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:51,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:51,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:05:51,574 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:51,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash 230754673, now seen corresponding path program 1 times [2024-11-07 19:05:51,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:51,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202608378] [2024-11-07 19:05:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:51,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:51,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202608378] [2024-11-07 19:05:51,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202608378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:51,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:51,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:05:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51997605] [2024-11-07 19:05:51,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:51,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:05:51,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:05:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:05:51,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-07 19:05:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-07 19:05:51,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:52,018 INFO L124 PetriNetUnfolderBase]: 572/1382 cut-off events. [2024-11-07 19:05:52,018 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-07 19:05:52,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1382 events. 572/1382 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7625 event pairs, 380 based on Foata normal form. 12/1194 useless extension candidates. Maximal degree in co-relation 1698. Up to 753 conditions per place. [2024-11-07 19:05:52,024 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 62 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-07 19:05:52,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 401 flow [2024-11-07 19:05:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:05:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:05:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-07 19:05:52,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7416020671834626 [2024-11-07 19:05:52,026 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 287 transitions. [2024-11-07 19:05:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 401 flow [2024-11-07 19:05:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-07 19:05:52,033 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 248 flow [2024-11-07 19:05:52,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-11-07 19:05:52,034 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-11-07 19:05:52,034 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 248 flow [2024-11-07 19:05:52,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:52,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:52,034 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:52,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:05:52,035 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:52,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1879953541, now seen corresponding path program 1 times [2024-11-07 19:05:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:52,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164059523] [2024-11-07 19:05:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:52,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164059523] [2024-11-07 19:05:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164059523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:52,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:52,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:05:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992484454] [2024-11-07 19:05:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:52,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:05:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:05:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:05:52,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-07 19:05:52,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:52,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:52,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-07 19:05:52,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:52,560 INFO L124 PetriNetUnfolderBase]: 572/1349 cut-off events. [2024-11-07 19:05:52,560 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-11-07 19:05:52,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 1349 events. 572/1349 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7253 event pairs, 515 based on Foata normal form. 31/1215 useless extension candidates. Maximal degree in co-relation 809. Up to 1007 conditions per place. [2024-11-07 19:05:52,566 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 50 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2024-11-07 19:05:52,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 346 flow [2024-11-07 19:05:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:05:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:05:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-11-07 19:05:52,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6847545219638242 [2024-11-07 19:05:52,568 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 248 flow. Second operand 3 states and 265 transitions. [2024-11-07 19:05:52,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 346 flow [2024-11-07 19:05:52,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:05:52,570 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 244 flow [2024-11-07 19:05:52,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-11-07 19:05:52,571 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-07 19:05:52,571 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 244 flow [2024-11-07 19:05:52,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:52,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:52,572 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:52,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:05:52,572 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:52,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1879953542, now seen corresponding path program 1 times [2024-11-07 19:05:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:52,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865082716] [2024-11-07 19:05:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:52,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:52,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865082716] [2024-11-07 19:05:52,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865082716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:05:52,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:05:52,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:05:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640866588] [2024-11-07 19:05:52,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:05:52,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:05:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:05:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:05:52,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2024-11-07 19:05:52,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:52,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:52,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2024-11-07 19:05:52,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:53,178 INFO L124 PetriNetUnfolderBase]: 587/1354 cut-off events. [2024-11-07 19:05:53,179 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-07 19:05:53,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1354 events. 587/1354 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7192 event pairs, 395 based on Foata normal form. 12/1197 useless extension candidates. Maximal degree in co-relation 2674. Up to 779 conditions per place. [2024-11-07 19:05:53,184 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 62 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-07 19:05:53,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 401 flow [2024-11-07 19:05:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:05:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:05:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2024-11-07 19:05:53,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2024-11-07 19:05:53,186 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 244 flow. Second operand 4 states and 358 transitions. [2024-11-07 19:05:53,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 401 flow [2024-11-07 19:05:53,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:05:53,190 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 253 flow [2024-11-07 19:05:53,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2024-11-07 19:05:53,191 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -21 predicate places. [2024-11-07 19:05:53,191 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 253 flow [2024-11-07 19:05:53,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:53,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:53,191 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:53,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:05:53,191 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:53,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -675303991, now seen corresponding path program 1 times [2024-11-07 19:05:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892262191] [2024-11-07 19:05:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892262191] [2024-11-07 19:05:53,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892262191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:05:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425780296] [2024-11-07 19:05:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:05:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:05:53,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:05:53,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 19:05:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:54,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-07 19:05:54,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:05:54,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-07 19:05:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:54,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:05:54,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-11-07 19:05:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:05:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:05:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:54,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425780296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:05:54,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:05:54,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-07 19:05:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191324403] [2024-11-07 19:05:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:05:54,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:05:54,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:05:54,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:05:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:05:56,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 129 [2024-11-07 19:05:56,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 253 flow. Second operand has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:56,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:05:56,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 129 [2024-11-07 19:05:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:05:56,839 INFO L124 PetriNetUnfolderBase]: 1005/2167 cut-off events. [2024-11-07 19:05:56,839 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-07 19:05:56,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4471 conditions, 2167 events. 1005/2167 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12911 event pairs, 183 based on Foata normal form. 12/1955 useless extension candidates. Maximal degree in co-relation 4457. Up to 471 conditions per place. [2024-11-07 19:05:56,851 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 127 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-11-07 19:05:56,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 731 flow [2024-11-07 19:05:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:05:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:05:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 738 transitions. [2024-11-07 19:05:56,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-11-07 19:05:56,853 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 253 flow. Second operand 10 states and 738 transitions. [2024-11-07 19:05:56,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 731 flow [2024-11-07 19:05:56,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 177 transitions, 723 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:05:56,858 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 329 flow [2024-11-07 19:05:56,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=329, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2024-11-07 19:05:56,860 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -11 predicate places. [2024-11-07 19:05:56,860 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 329 flow [2024-11-07 19:05:56,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:05:56,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:05:56,861 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:05:56,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-07 19:05:57,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-07 19:05:57,063 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:05:57,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:05:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1787894202, now seen corresponding path program 1 times [2024-11-07 19:05:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:05:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216053194] [2024-11-07 19:05:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:05:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:05:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216053194] [2024-11-07 19:05:58,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216053194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:05:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734436314] [2024-11-07 19:05:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:05:58,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:05:58,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:05:58,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:05:58,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:05:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:05:59,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-07 19:05:59,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:05:59,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-07 19:05:59,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-07 19:05:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:05:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:05:59,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2024-11-07 19:05:59,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-07 19:05:59,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-07 19:05:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:05:59,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:06:16,301 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse2 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604)) (.cse3 (select |c_#memory_int#3| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse4 (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse5 (+ |c_~#queue~0.offset| 1604))) (and (forall ((|t1Thread1of1ForFork0_enqueue_#t~post38#1| Int) (v_ArrVal_172 Int)) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store |c_#memory_int#3| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse0 (store .cse3 .cse4 v_ArrVal_172))) (store (store .cse0 .cse1 (+ 1 |t1Thread1of1ForFork0_enqueue_#t~post38#1|)) .cse2 (+ (select .cse0 .cse2) 1)))) |c_~#queue~0.base|) .cse5) 4)))) (forall ((|t1Thread1of1ForFork0_enqueue_#t~post38#1| Int) (v_ArrVal_172 Int)) (<= (+ |c_~#queue~0.offset| 4 (* (select (select (store |c_#memory_int#3| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse6 (store .cse3 .cse4 v_ArrVal_172))) (store (store .cse6 .cse1 (+ 1 |t1Thread1of1ForFork0_enqueue_#t~post38#1|)) .cse2 (+ (select .cse6 .cse2) 1)))) |c_~#queue~0.base|) .cse5) 4)) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2024-11-07 19:06:29,545 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int#3| |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (let ((.cse2 (select .cse0 .cse1))) (and (forall ((|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23| Int)) (or (forall ((v_ArrVal_172 Int)) (<= 0 (+ (* (select (store .cse0 (+ (* 4 |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23|) |c_~#queue~0.offset|) v_ArrVal_172) .cse1) 4) |c_~#queue~0.offset| 4))) (< .cse2 |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23|))) (forall ((|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23| Int)) (or (forall ((v_ArrVal_172 Int)) (<= (+ (* (select (store .cse0 (+ (* 4 |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23|) |c_~#queue~0.offset|) v_ArrVal_172) .cse1) 4) |c_~#queue~0.offset| 8) (select |c_#length| |c_~#queue~0.base|))) (< .cse2 |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_23|)))))) is different from false [2024-11-07 19:06:42,537 INFO L349 Elim1Store]: treesize reduction 47, result has 52.5 percent of original size [2024-11-07 19:06:42,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 146 [2024-11-07 19:06:42,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:06:42,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 73 [2024-11-07 19:06:42,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-07 19:06:42,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:06:42,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2024-11-07 19:06:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:06:42,911 INFO L349 Elim1Store]: treesize reduction 57, result has 26.9 percent of original size [2024-11-07 19:06:42,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 89 [2024-11-07 19:06:42,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-07 19:06:42,931 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-07 19:06:42,968 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2024-11-07 19:06:42,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2024-11-07 19:06:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-07 19:06:43,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734436314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:06:43,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:06:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 31 [2024-11-07 19:06:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685648527] [2024-11-07 19:06:43,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:06:43,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-07 19:06:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:06:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-07 19:06:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=8, NotChecked=118, Total=1056 [2024-11-07 19:06:43,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 129 [2024-11-07 19:06:43,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 329 flow. Second operand has 33 states, 33 states have (on average 28.363636363636363) internal successors, (936), 33 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:43,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:06:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 129 [2024-11-07 19:06:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:06:47,858 INFO L124 PetriNetUnfolderBase]: 2344/4499 cut-off events. [2024-11-07 19:06:47,858 INFO L125 PetriNetUnfolderBase]: For 787/787 co-relation queries the response was YES. [2024-11-07 19:06:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10188 conditions, 4499 events. 2344/4499 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 26018 event pairs, 443 based on Foata normal form. 24/4198 useless extension candidates. Maximal degree in co-relation 10170. Up to 1756 conditions per place. [2024-11-07 19:06:47,876 INFO L140 encePairwiseOnDemand]: 116/129 looper letters, 224 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2024-11-07 19:06:47,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 270 transitions, 1286 flow [2024-11-07 19:06:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 19:06:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 19:06:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 655 transitions. [2024-11-07 19:06:47,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3173449612403101 [2024-11-07 19:06:47,880 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 329 flow. Second operand 16 states and 655 transitions. [2024-11-07 19:06:47,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 270 transitions, 1286 flow [2024-11-07 19:06:47,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 270 transitions, 1265 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-07 19:06:47,886 INFO L231 Difference]: Finished difference. Result has 128 places, 123 transitions, 537 flow [2024-11-07 19:06:47,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=537, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2024-11-07 19:06:47,887 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, 6 predicate places. [2024-11-07 19:06:47,887 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 537 flow [2024-11-07 19:06:47,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 28.363636363636363) internal successors, (936), 33 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:47,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:06:47,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:06:47,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:06:48,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:06:48,089 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:06:48,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:06:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2096467843, now seen corresponding path program 1 times [2024-11-07 19:06:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:06:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951746825] [2024-11-07 19:06:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:06:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:06:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951746825] [2024-11-07 19:06:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951746825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:06:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:06:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:06:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971673206] [2024-11-07 19:06:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:06:48,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:06:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:06:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:06:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:06:48,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2024-11-07 19:06:48,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:48,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:06:48,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2024-11-07 19:06:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:06:48,733 INFO L124 PetriNetUnfolderBase]: 1675/3817 cut-off events. [2024-11-07 19:06:48,734 INFO L125 PetriNetUnfolderBase]: For 1533/1533 co-relation queries the response was YES. [2024-11-07 19:06:48,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8856 conditions, 3817 events. 1675/3817 cut-off events. For 1533/1533 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 25072 event pairs, 1526 based on Foata normal form. 11/3375 useless extension candidates. Maximal degree in co-relation 8833. Up to 2934 conditions per place. [2024-11-07 19:06:48,758 INFO L140 encePairwiseOnDemand]: 127/129 looper letters, 70 selfloop transitions, 1 changer transitions 3/122 dead transitions. [2024-11-07 19:06:48,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 122 transitions, 681 flow [2024-11-07 19:06:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:06:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:06:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2024-11-07 19:06:48,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2024-11-07 19:06:48,760 INFO L175 Difference]: Start difference. First operand has 128 places, 123 transitions, 537 flow. Second operand 3 states and 267 transitions. [2024-11-07 19:06:48,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 122 transitions, 681 flow [2024-11-07 19:06:48,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 647 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-07 19:06:48,774 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 495 flow [2024-11-07 19:06:48,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=495, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2024-11-07 19:06:48,775 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, 1 predicate places. [2024-11-07 19:06:48,775 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 495 flow [2024-11-07 19:06:48,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:48,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:06:48,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:06:48,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:06:48,776 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:06:48,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:06:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash -580366467, now seen corresponding path program 1 times [2024-11-07 19:06:48,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:06:48,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254013995] [2024-11-07 19:06:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:48,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:06:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:06:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254013995] [2024-11-07 19:06:48,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254013995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:06:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445649573] [2024-11-07 19:06:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:06:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:06:48,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:06:48,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 19:06:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:49,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:06:49,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:06:49,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-07 19:06:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:06:49,312 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:06:49,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445649573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:06:49,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:06:49,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-07 19:06:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284310477] [2024-11-07 19:06:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:06:49,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:06:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:06:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:06:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:06:49,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-07 19:06:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 495 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:06:49,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-07 19:06:49,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:06:49,708 INFO L124 PetriNetUnfolderBase]: 1101/2780 cut-off events. [2024-11-07 19:06:49,709 INFO L125 PetriNetUnfolderBase]: For 1008/1008 co-relation queries the response was YES. [2024-11-07 19:06:49,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6458 conditions, 2780 events. 1101/2780 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 17216 event pairs, 177 based on Foata normal form. 116/2571 useless extension candidates. Maximal degree in co-relation 6435. Up to 1708 conditions per place. [2024-11-07 19:06:49,722 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 75 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2024-11-07 19:06:49,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 127 transitions, 671 flow [2024-11-07 19:06:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:06:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:06:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-11-07 19:06:49,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7157622739018088 [2024-11-07 19:06:49,723 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 495 flow. Second operand 3 states and 277 transitions. [2024-11-07 19:06:49,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 127 transitions, 671 flow [2024-11-07 19:06:49,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:06:49,730 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 502 flow [2024-11-07 19:06:49,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-11-07 19:06:49,731 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, 0 predicate places. [2024-11-07 19:06:49,731 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 502 flow [2024-11-07 19:06:49,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:49,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:06:49,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:06:49,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:06:49,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:06:49,936 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:06:49,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:06:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 467214656, now seen corresponding path program 1 times [2024-11-07 19:06:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:06:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628958457] [2024-11-07 19:06:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:06:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:50,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:06:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628958457] [2024-11-07 19:06:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628958457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:06:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48918185] [2024-11-07 19:06:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:50,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:06:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:06:50,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:06:50,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 19:06:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:50,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:06:50,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:06:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:50,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:06:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:50,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48918185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:06:50,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:06:50,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-07 19:06:50,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255317777] [2024-11-07 19:06:50,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:06:50,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:06:50,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:06:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:06:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:06:50,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-07 19:06:50,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:50,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:06:50,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-07 19:06:50,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:06:50,995 INFO L124 PetriNetUnfolderBase]: 1414/3417 cut-off events. [2024-11-07 19:06:50,995 INFO L125 PetriNetUnfolderBase]: For 1866/1866 co-relation queries the response was YES. [2024-11-07 19:06:51,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8816 conditions, 3417 events. 1414/3417 cut-off events. For 1866/1866 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 20166 event pairs, 439 based on Foata normal form. 80/3171 useless extension candidates. Maximal degree in co-relation 8793. Up to 914 conditions per place. [2024-11-07 19:06:51,011 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 117 selfloop transitions, 9 changer transitions 0/174 dead transitions. [2024-11-07 19:06:51,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1010 flow [2024-11-07 19:06:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:06:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:06:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 543 transitions. [2024-11-07 19:06:51,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7015503875968992 [2024-11-07 19:06:51,014 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 502 flow. Second operand 6 states and 543 transitions. [2024-11-07 19:06:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1010 flow [2024-11-07 19:06:51,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1006 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:06:51,026 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 579 flow [2024-11-07 19:06:51,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-11-07 19:06:51,027 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, 8 predicate places. [2024-11-07 19:06:51,027 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 579 flow [2024-11-07 19:06:51,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:06:51,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:06:51,028 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:06:51,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:06:51,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:06:51,228 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-07 19:06:51,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:06:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 558942549, now seen corresponding path program 1 times [2024-11-07 19:06:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:06:51,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448658141] [2024-11-07 19:06:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:06:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:51,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:06:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448658141] [2024-11-07 19:06:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448658141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:06:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110905907] [2024-11-07 19:06:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:06:51,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:06:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:06:51,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:06:51,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-07 19:06:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:06:52,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:06:52,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:06:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:52,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:06:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:06:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110905907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:06:52,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:06:52,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-07 19:06:52,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590993843] [2024-11-07 19:06:52,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:06:52,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 19:06:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:06:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 19:06:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132