./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --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/weaver/popl20-commit-1.wvr.c', '-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', '73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e'] 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/weaver/popl20-commit-1.wvr.c -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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:33:39,094 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:33:39,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:33:39,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:33:39,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:33:39,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:33:39,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:33:39,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:33:39,217 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:33:39,217 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:33:39,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:33:39,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:33:39,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:33:39,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:33:39,218 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:33:39,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:33:39,218 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:33:39,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:33:39,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:33:39,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:33:39,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:33:39,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:33:39,221 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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-11-07 19:33:39,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:33:39,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:33:39,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:33:39,442 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:33:39,442 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:33:39,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-07 19:33:40,559 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:33:40,764 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:33:40,764 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-07 19:33:40,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/593948bfc/2eefd22e81bd489190399acc7cdb6ee1/FLAG26af3460e [2024-11-07 19:33:41,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/593948bfc/2eefd22e81bd489190399acc7cdb6ee1 [2024-11-07 19:33:41,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:33:41,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:33:41,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:33:41,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:33:41,145 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:33:41,145 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449c29e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41, skipping insertion in model container [2024-11-07 19:33:41,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,158 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:33:41,315 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-07 19:33:41,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:33:41,328 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:33:41,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:33:41,378 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:33:41,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41 WrapperNode [2024-11-07 19:33:41,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:33:41,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:33:41,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:33:41,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:33:41,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,422 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-11-07 19:33:41,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:33:41,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:33:41,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:33:41,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:33:41,430 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,438 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,456 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-07 19:33:41,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,466 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:33:41,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:33:41,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:33:41,474 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:33:41,475 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (1/1) ... [2024-11-07 19:33:41,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:33:41,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:41,508 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 19:33:41,520 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 19:33:41,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:33:41,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:33:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:33:41,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:33:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:33:41,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:33:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:33:41,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:33:41,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:33:41,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:33:41,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:33:41,544 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 19:33:41,626 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:33:41,627 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:33:42,004 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:33:42,004 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:33:42,311 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:33:42,311 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:33:42,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:42 BoogieIcfgContainer [2024-11-07 19:33:42,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:33:42,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:33:42,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:33:42,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:33:42,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:33:41" (1/3) ... [2024-11-07 19:33:42,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bde3fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:42, skipping insertion in model container [2024-11-07 19:33:42,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:41" (2/3) ... [2024-11-07 19:33:42,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bde3fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:42, skipping insertion in model container [2024-11-07 19:33:42,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:42" (3/3) ... [2024-11-07 19:33:42,319 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-11-07 19:33:42,330 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:33:42,331 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-07 19:33:42,331 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:33:42,398 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:33:42,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-11-07 19:33:42,447 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-11-07 19:33:42,449 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:33:42,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-11-07 19:33:42,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-11-07 19:33:42,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-11-07 19:33:42,462 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:33:42,469 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;@32599097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:33:42,469 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-07 19:33:42,473 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:33:42,473 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:33:42,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:33:42,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:42,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:42,474 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:42,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1034912, now seen corresponding path program 1 times [2024-11-07 19:33:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639787300] [2024-11-07 19:33:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:42,660 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 19:33:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639787300] [2024-11-07 19:33:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639787300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:42,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:33:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731449538] [2024-11-07 19:33:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:42,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:42,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:42,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:33:42,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:42,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:44,188 INFO L124 PetriNetUnfolderBase]: 11258/15925 cut-off events. [2024-11-07 19:33:44,188 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2024-11-07 19:33:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32375 conditions, 15925 events. 11258/15925 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 90309 event pairs, 10184 based on Foata normal form. 1/9499 useless extension candidates. Maximal degree in co-relation 31435. Up to 15894 conditions per place. [2024-11-07 19:33:44,256 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-07 19:33:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-11-07 19:33:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-07 19:33:44,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-07 19:33:44,277 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-11-07 19:33:44,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-11-07 19:33:44,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:33:44,288 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-07 19:33:44,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-07 19:33:44,292 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-07 19:33:44,292 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-07 19:33:44,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:33:44,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:44,292 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:44,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:33:44,293 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:44,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1034913, now seen corresponding path program 1 times [2024-11-07 19:33:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771608112] [2024-11-07 19:33:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:44,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:44,522 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 19:33:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771608112] [2024-11-07 19:33:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771608112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:44,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849115977] [2024-11-07 19:33:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:44,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:44,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:44,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:45,692 INFO L124 PetriNetUnfolderBase]: 11261/15934 cut-off events. [2024-11-07 19:33:45,692 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-07 19:33:45,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32059 conditions, 15934 events. 11261/15934 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90442 event pairs, 10184 based on Foata normal form. 0/9503 useless extension candidates. Maximal degree in co-relation 32009. Up to 15907 conditions per place. [2024-11-07 19:33:45,737 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-11-07 19:33:45,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-11-07 19:33:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-07 19:33:45,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-07 19:33:45,739 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-11-07 19:33:45,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-11-07 19:33:45,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:45,740 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-11-07 19:33:45,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-11-07 19:33:45,741 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-11-07 19:33:45,741 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-11-07 19:33:45,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:45,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:45,742 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:33:45,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:33:45,742 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:45,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash 994583983, now seen corresponding path program 1 times [2024-11-07 19:33:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:45,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78493073] [2024-11-07 19:33:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78493073] [2024-11-07 19:33:45,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78493073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494424849] [2024-11-07 19:33:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:45,948 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 19:33:45,950 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 19:33:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:46,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:33:46,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:46,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-07 19:33:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:46,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494424849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:33:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706322667] [2024-11-07 19:33:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:46,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:33:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:33:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:33:46,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:46,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:33:46,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:46,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:46,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:47,506 INFO L124 PetriNetUnfolderBase]: 11264/15940 cut-off events. [2024-11-07 19:33:47,506 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-11-07 19:33:47,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32110 conditions, 15940 events. 11264/15940 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90556 event pairs, 10184 based on Foata normal form. 0/9514 useless extension candidates. Maximal degree in co-relation 32023. Up to 15896 conditions per place. [2024-11-07 19:33:47,572 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 48 selfloop transitions, 26 changer transitions 0/78 dead transitions. [2024-11-07 19:33:47,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 390 flow [2024-11-07 19:33:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:33:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:33:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-11-07 19:33:47,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-11-07 19:33:47,577 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 8 states and 168 transitions. [2024-11-07 19:33:47,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 390 flow [2024-11-07 19:33:47,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:33:47,579 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 294 flow [2024-11-07 19:33:47,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-07 19:33:47,580 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-07 19:33:47,580 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 294 flow [2024-11-07 19:33:47,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:33:47,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:47,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:47,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:33:47,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:47,786 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:47,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1537323912, now seen corresponding path program 1 times [2024-11-07 19:33:47,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:47,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013684291] [2024-11-07 19:33:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:47,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:47,855 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 19:33:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013684291] [2024-11-07 19:33:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013684291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:47,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:47,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:33:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515572729] [2024-11-07 19:33:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:47,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:47,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:47,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:47,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:47,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:47,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:49,002 INFO L124 PetriNetUnfolderBase]: 13086/18562 cut-off events. [2024-11-07 19:33:49,002 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-07 19:33:49,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37407 conditions, 18562 events. 13086/18562 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 107601 event pairs, 4436 based on Foata normal form. 162/11415 useless extension candidates. Maximal degree in co-relation 37295. Up to 15883 conditions per place. [2024-11-07 19:33:49,116 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 99 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2024-11-07 19:33:49,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 558 flow [2024-11-07 19:33:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-07 19:33:49,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-11-07 19:33:49,118 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 294 flow. Second operand 3 states and 129 transitions. [2024-11-07 19:33:49,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 558 flow [2024-11-07 19:33:49,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 487 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-07 19:33:49,121 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 246 flow [2024-11-07 19:33:49,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2024-11-07 19:33:49,122 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2024-11-07 19:33:49,122 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 246 flow [2024-11-07 19:33:49,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:49,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:49,122 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:49,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:33:49,122 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:49,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -117045361, now seen corresponding path program 1 times [2024-11-07 19:33:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235086196] [2024-11-07 19:33:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:49,177 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 19:33:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235086196] [2024-11-07 19:33:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235086196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:49,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:49,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399555974] [2024-11-07 19:33:49,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:49,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:49,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:49,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 19:33:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:49,949 INFO L124 PetriNetUnfolderBase]: 12333/17526 cut-off events. [2024-11-07 19:33:49,949 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2024-11-07 19:33:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36974 conditions, 17526 events. 12333/17526 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 95948 event pairs, 4948 based on Foata normal form. 297/11634 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2024-11-07 19:33:50,014 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 102 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2024-11-07 19:33:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 518 flow [2024-11-07 19:33:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-07 19:33:50,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-07 19:33:50,017 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 246 flow. Second operand 3 states and 130 transitions. [2024-11-07 19:33:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 518 flow [2024-11-07 19:33:50,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:50,024 INFO L231 Difference]: Finished difference. Result has 70 places, 80 transitions, 255 flow [2024-11-07 19:33:50,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=70, PETRI_TRANSITIONS=80} [2024-11-07 19:33:50,025 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-07 19:33:50,025 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 80 transitions, 255 flow [2024-11-07 19:33:50,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 19:33:50,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:50,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:50,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:33:50,025 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:50,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:50,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232416, now seen corresponding path program 1 times [2024-11-07 19:33:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:50,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352817248] [2024-11-07 19:33:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:50,116 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 19:33:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352817248] [2024-11-07 19:33:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352817248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:50,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:50,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008896578] [2024-11-07 19:33:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:50,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:50,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:50,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 80 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 19:33:50,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:50,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:50,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:50,891 INFO L124 PetriNetUnfolderBase]: 12946/18508 cut-off events. [2024-11-07 19:33:50,891 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-11-07 19:33:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40328 conditions, 18508 events. 12946/18508 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 102937 event pairs, 11912 based on Foata normal form. 112/12564 useless extension candidates. Maximal degree in co-relation 12447. Up to 17508 conditions per place. [2024-11-07 19:33:50,951 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 105 selfloop transitions, 8 changer transitions 3/120 dead transitions. [2024-11-07 19:33:50,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 611 flow [2024-11-07 19:33:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-07 19:33:50,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-11-07 19:33:50,953 INFO L175 Difference]: Start difference. First operand has 70 places, 80 transitions, 255 flow. Second operand 5 states and 166 transitions. [2024-11-07 19:33:50,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 611 flow [2024-11-07 19:33:50,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:50,955 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 320 flow [2024-11-07 19:33:50,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-11-07 19:33:50,956 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-07 19:33:50,956 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 320 flow [2024-11-07 19:33:50,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 19:33:50,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:50,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:50,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:33:50,956 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:50,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599918, now seen corresponding path program 1 times [2024-11-07 19:33:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882673089] [2024-11-07 19:33:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882673089] [2024-11-07 19:33:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882673089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:51,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140192175] [2024-11-07 19:33:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:51,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:51,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:51,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 19:33:51,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:51,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:51,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:51,705 INFO L124 PetriNetUnfolderBase]: 9843/14132 cut-off events. [2024-11-07 19:33:51,705 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-11-07 19:33:51,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31166 conditions, 14132 events. 9843/14132 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 76943 event pairs, 9001 based on Foata normal form. 0/10250 useless extension candidates. Maximal degree in co-relation 29133. Up to 14062 conditions per place. [2024-11-07 19:33:51,750 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 69 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2024-11-07 19:33:51,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 462 flow [2024-11-07 19:33:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-07 19:33:51,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.296 [2024-11-07 19:33:51,751 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 320 flow. Second operand 5 states and 111 transitions. [2024-11-07 19:33:51,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 462 flow [2024-11-07 19:33:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:51,755 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 320 flow [2024-11-07 19:33:51,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-11-07 19:33:51,756 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-07 19:33:51,756 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 320 flow [2024-11-07 19:33:51,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 19:33:51,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:51,756 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:51,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:33:51,756 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:51,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599919, now seen corresponding path program 1 times [2024-11-07 19:33:51,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:51,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088731519] [2024-11-07 19:33:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:52,052 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 19:33:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088731519] [2024-11-07 19:33:52,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088731519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711779347] [2024-11-07 19:33:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:52,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:52,055 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 19:33:52,056 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 19:33:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:52,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:33:52,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:52,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-07 19:33:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:33:52,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 13 [2024-11-07 19:33:52,208 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-07 19:33:52,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-07 19:33:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:33:52,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 13 [2024-11-07 19:33:52,244 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:33:52,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-07 19:33:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:52,285 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:33:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711779347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:52,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:33:52,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-07 19:33:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034627081] [2024-11-07 19:33:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:52,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:33:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:33:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:33:52,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:52,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 19:33:52,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:52,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:52,872 INFO L124 PetriNetUnfolderBase]: 7310/10556 cut-off events. [2024-11-07 19:33:52,872 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-07 19:33:52,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22898 conditions, 10556 events. 7310/10556 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 55314 event pairs, 6640 based on Foata normal form. 568/8326 useless extension candidates. Maximal degree in co-relation 20779. Up to 10519 conditions per place. [2024-11-07 19:33:52,901 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-07 19:33:52,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 454 flow [2024-11-07 19:33:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-07 19:33:52,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-07 19:33:52,903 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 320 flow. Second operand 4 states and 96 transitions. [2024-11-07 19:33:52,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 454 flow [2024-11-07 19:33:52,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:52,905 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 304 flow [2024-11-07 19:33:52,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-11-07 19:33:52,905 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-07 19:33:52,905 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 304 flow [2024-11-07 19:33:52,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 19:33:52,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:52,906 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:52,920 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 19:33:53,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:53,106 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:53,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1711860245, now seen corresponding path program 1 times [2024-11-07 19:33:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:53,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450892282] [2024-11-07 19:33:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:53,153 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 19:33:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:53,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450892282] [2024-11-07 19:33:53,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450892282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:53,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:53,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949209643] [2024-11-07 19:33:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:53,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:53,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:53,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 19:33:53,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:53,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:53,733 INFO L124 PetriNetUnfolderBase]: 5974/8687 cut-off events. [2024-11-07 19:33:53,733 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-11-07 19:33:53,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 8687 events. 5974/8687 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43405 event pairs, 2918 based on Foata normal form. 158/6500 useless extension candidates. Maximal degree in co-relation 16909. Up to 6301 conditions per place. [2024-11-07 19:33:53,765 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 99 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-11-07 19:33:53,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 575 flow [2024-11-07 19:33:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-07 19:33:53,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-11-07 19:33:53,766 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 304 flow. Second operand 3 states and 123 transitions. [2024-11-07 19:33:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 575 flow [2024-11-07 19:33:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:53,769 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 315 flow [2024-11-07 19:33:53,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-07 19:33:53,770 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-07 19:33:53,770 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 315 flow [2024-11-07 19:33:53,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 19:33:53,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:53,770 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] [2024-11-07 19:33:53,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:33:53,771 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:53,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1213487871, now seen corresponding path program 1 times [2024-11-07 19:33:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993881890] [2024-11-07 19:33:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:53,870 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 19:33:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993881890] [2024-11-07 19:33:53,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993881890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:53,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:53,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755499841] [2024-11-07 19:33:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:53,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:53,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 19:33:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:54,492 INFO L124 PetriNetUnfolderBase]: 7316/10809 cut-off events. [2024-11-07 19:33:54,492 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2024-11-07 19:33:54,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24226 conditions, 10809 events. 7316/10809 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 57988 event pairs, 6726 based on Foata normal form. 20/8255 useless extension candidates. Maximal degree in co-relation 20222. Up to 8627 conditions per place. [2024-11-07 19:33:54,524 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 83 selfloop transitions, 10 changer transitions 5/102 dead transitions. [2024-11-07 19:33:54,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 571 flow [2024-11-07 19:33:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-07 19:33:54,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-07 19:33:54,525 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 315 flow. Second operand 4 states and 134 transitions. [2024-11-07 19:33:54,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 571 flow [2024-11-07 19:33:54,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:54,528 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 347 flow [2024-11-07 19:33:54,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-07 19:33:54,531 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-07 19:33:54,531 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 347 flow [2024-11-07 19:33:54,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 19:33:54,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:54,532 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 19:33:54,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:33:54,532 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:54,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1567978212, now seen corresponding path program 1 times [2024-11-07 19:33:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362469958] [2024-11-07 19:33:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362469958] [2024-11-07 19:33:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362469958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:54,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:54,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:54,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443356777] [2024-11-07 19:33:54,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:54,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:54,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:54,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:54,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:54,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 19:33:54,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:55,206 INFO L124 PetriNetUnfolderBase]: 6475/9622 cut-off events. [2024-11-07 19:33:55,206 INFO L125 PetriNetUnfolderBase]: For 1135/1135 co-relation queries the response was YES. [2024-11-07 19:33:55,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21530 conditions, 9622 events. 6475/9622 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 51380 event pairs, 5958 based on Foata normal form. 0/7577 useless extension candidates. Maximal degree in co-relation 17516. Up to 9525 conditions per place. [2024-11-07 19:33:55,229 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 63 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-11-07 19:33:55,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 483 flow [2024-11-07 19:33:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-07 19:33:55,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-11-07 19:33:55,230 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 347 flow. Second operand 4 states and 104 transitions. [2024-11-07 19:33:55,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 483 flow [2024-11-07 19:33:55,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:55,232 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 346 flow [2024-11-07 19:33:55,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-11-07 19:33:55,233 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-07 19:33:55,234 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 346 flow [2024-11-07 19:33:55,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 19:33:55,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:55,234 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 19:33:55,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:33:55,234 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:55,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1567978211, now seen corresponding path program 1 times [2024-11-07 19:33:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:55,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231184486] [2024-11-07 19:33:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:55,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:55,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231184486] [2024-11-07 19:33:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231184486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:55,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:55,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926680983] [2024-11-07 19:33:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:55,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:55,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:33:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:33:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:33:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:55,624 INFO L124 PetriNetUnfolderBase]: 5714/8547 cut-off events. [2024-11-07 19:33:55,624 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2024-11-07 19:33:55,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18827 conditions, 8547 events. 5714/8547 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 45420 event pairs, 5266 based on Foata normal form. 122/6983 useless extension candidates. Maximal degree in co-relation 14810. Up to 8450 conditions per place. [2024-11-07 19:33:55,648 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 65 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-11-07 19:33:55,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 478 flow [2024-11-07 19:33:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-07 19:33:55,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-07 19:33:55,649 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 346 flow. Second operand 4 states and 90 transitions. [2024-11-07 19:33:55,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 478 flow [2024-11-07 19:33:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:55,651 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 334 flow [2024-11-07 19:33:55,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-11-07 19:33:55,652 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-11-07 19:33:55,652 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 334 flow [2024-11-07 19:33:55,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:33:55,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:55,652 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] [2024-11-07 19:33:55,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 19:33:55,652 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:55,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -706424026, now seen corresponding path program 1 times [2024-11-07 19:33:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128219123] [2024-11-07 19:33:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:55,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128219123] [2024-11-07 19:33:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128219123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:55,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:55,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:55,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287510534] [2024-11-07 19:33:55,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:55,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:55,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 19:33:55,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:55,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:55,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:56,203 INFO L124 PetriNetUnfolderBase]: 8442/12875 cut-off events. [2024-11-07 19:33:56,203 INFO L125 PetriNetUnfolderBase]: For 1155/1155 co-relation queries the response was YES. [2024-11-07 19:33:56,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27860 conditions, 12875 events. 8442/12875 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76663 event pairs, 7988 based on Foata normal form. 28/10435 useless extension candidates. Maximal degree in co-relation 19915. Up to 8477 conditions per place. [2024-11-07 19:33:56,241 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 93 selfloop transitions, 7 changer transitions 9/113 dead transitions. [2024-11-07 19:33:56,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 706 flow [2024-11-07 19:33:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-07 19:33:56,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-11-07 19:33:56,242 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 334 flow. Second operand 4 states and 137 transitions. [2024-11-07 19:33:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 706 flow [2024-11-07 19:33:56,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:56,244 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 353 flow [2024-11-07 19:33:56,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-07 19:33:56,245 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-07 19:33:56,245 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 353 flow [2024-11-07 19:33:56,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 19:33:56,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:56,245 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] [2024-11-07 19:33:56,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 19:33:56,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:56,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1783579436, now seen corresponding path program 1 times [2024-11-07 19:33:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549643719] [2024-11-07 19:33:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:33:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549643719] [2024-11-07 19:33:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549643719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:56,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162218245] [2024-11-07 19:33:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:56,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:56,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:56,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 19:33:56,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:56,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:56,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:57,281 INFO L124 PetriNetUnfolderBase]: 12994/19429 cut-off events. [2024-11-07 19:33:57,281 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2024-11-07 19:33:57,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43767 conditions, 19429 events. 12994/19429 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 110168 event pairs, 8638 based on Foata normal form. 216/15690 useless extension candidates. Maximal degree in co-relation 35813. Up to 11159 conditions per place. [2024-11-07 19:33:57,348 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 120 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-07 19:33:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 132 transitions, 781 flow [2024-11-07 19:33:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-07 19:33:57,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-11-07 19:33:57,349 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 353 flow. Second operand 4 states and 158 transitions. [2024-11-07 19:33:57,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 132 transitions, 781 flow [2024-11-07 19:33:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 757 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:57,353 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 392 flow [2024-11-07 19:33:57,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-11-07 19:33:57,354 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-07 19:33:57,354 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 392 flow [2024-11-07 19:33:57,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 19:33:57,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:57,354 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] [2024-11-07 19:33:57,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:33:57,354 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:57,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 593677860, now seen corresponding path program 1 times [2024-11-07 19:33:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270010627] [2024-11-07 19:33:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:57,398 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 19:33:57,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:57,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270010627] [2024-11-07 19:33:57,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270010627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:57,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:57,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:57,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919911356] [2024-11-07 19:33:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:57,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:57,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:57,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:57,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:33:57,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:57,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:57,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:58,303 INFO L124 PetriNetUnfolderBase]: 12994/19413 cut-off events. [2024-11-07 19:33:58,304 INFO L125 PetriNetUnfolderBase]: For 6772/6772 co-relation queries the response was YES. [2024-11-07 19:33:58,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46659 conditions, 19413 events. 12994/19413 cut-off events. For 6772/6772 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 109847 event pairs, 10339 based on Foata normal form. 8/15464 useless extension candidates. Maximal degree in co-relation 38723. Up to 10967 conditions per place. [2024-11-07 19:33:58,349 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 74 selfloop transitions, 2 changer transitions 17/97 dead transitions. [2024-11-07 19:33:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 621 flow [2024-11-07 19:33:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-07 19:33:58,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-07 19:33:58,350 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 392 flow. Second operand 3 states and 105 transitions. [2024-11-07 19:33:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 621 flow [2024-11-07 19:33:58,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 613 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-07 19:33:58,359 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 328 flow [2024-11-07 19:33:58,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-07 19:33:58,363 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-11-07 19:33:58,363 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 328 flow [2024-11-07 19:33:58,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:33:58,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:58,364 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] [2024-11-07 19:33:58,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:33:58,364 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:58,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1515257772, now seen corresponding path program 1 times [2024-11-07 19:33:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623040510] [2024-11-07 19:33:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:58,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623040510] [2024-11-07 19:33:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623040510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:58,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52372040] [2024-11-07 19:33:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:58,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:58,482 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 19:33:58,485 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 19:33:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:58,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:33:58,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:58,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:58,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52372040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:58,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:58,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-07 19:33:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553063319] [2024-11-07 19:33:58,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:58,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:33:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:33:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:33:58,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:33:58,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 328 flow. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 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 19:33:58,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:58,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:33:58,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:59,582 INFO L124 PetriNetUnfolderBase]: 9029/13114 cut-off events. [2024-11-07 19:33:59,583 INFO L125 PetriNetUnfolderBase]: For 5657/5657 co-relation queries the response was YES. [2024-11-07 19:33:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 13114 events. 9029/13114 cut-off events. For 5657/5657 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 65728 event pairs, 7859 based on Foata normal form. 2/10401 useless extension candidates. Maximal degree in co-relation 30240. Up to 11889 conditions per place. [2024-11-07 19:33:59,638 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 51 selfloop transitions, 17 changer transitions 58/130 dead transitions. [2024-11-07 19:33:59,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 130 transitions, 773 flow [2024-11-07 19:33:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:33:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:33:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-07 19:33:59,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-07 19:33:59,640 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 328 flow. Second operand 9 states and 225 transitions. [2024-11-07 19:33:59,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 130 transitions, 773 flow [2024-11-07 19:33:59,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 732 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-07 19:33:59,651 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 340 flow [2024-11-07 19:33:59,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=340, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2024-11-07 19:33:59,652 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2024-11-07 19:33:59,652 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 340 flow [2024-11-07 19:33:59,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 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 19:33:59,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:59,652 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, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:59,664 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 19:33:59,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:59,857 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:33:59,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash 92232290, now seen corresponding path program 2 times [2024-11-07 19:33:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644262191] [2024-11-07 19:33:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:33:59,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644262191] [2024-11-07 19:33:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644262191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:59,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:59,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:33:59,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345843797] [2024-11-07 19:33:59,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:59,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:33:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:33:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-07 19:34:00,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:34:00,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 19:34:00,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:00,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:34:00,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:00,576 INFO L124 PetriNetUnfolderBase]: 6676/9647 cut-off events. [2024-11-07 19:34:00,576 INFO L125 PetriNetUnfolderBase]: For 4783/4783 co-relation queries the response was YES. [2024-11-07 19:34:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 9647 events. 6676/9647 cut-off events. For 4783/4783 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 46215 event pairs, 5798 based on Foata normal form. 0/8070 useless extension candidates. Maximal degree in co-relation 24058. Up to 9609 conditions per place. [2024-11-07 19:34:00,604 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 61 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-07 19:34:00,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 70 transitions, 466 flow [2024-11-07 19:34:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:34:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:34:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-11-07 19:34:00,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.264 [2024-11-07 19:34:00,605 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 340 flow. Second operand 5 states and 99 transitions. [2024-11-07 19:34:00,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 70 transitions, 466 flow [2024-11-07 19:34:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 424 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-07 19:34:00,610 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 302 flow [2024-11-07 19:34:00,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-07 19:34:00,610 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-07 19:34:00,610 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 302 flow [2024-11-07 19:34:00,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 19:34:00,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:00,610 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, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:00,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:34:00,611 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:34:00,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 92232291, now seen corresponding path program 1 times [2024-11-07 19:34:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418472846] [2024-11-07 19:34:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:34:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418472846] [2024-11-07 19:34:00,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418472846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:00,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:00,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:34:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625790254] [2024-11-07 19:34:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:00,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:34:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:34:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:34:00,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-07 19:34:00,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:34:00,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:00,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-07 19:34:00,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:01,361 INFO L124 PetriNetUnfolderBase]: 5257/7631 cut-off events. [2024-11-07 19:34:01,361 INFO L125 PetriNetUnfolderBase]: For 3336/3336 co-relation queries the response was YES. [2024-11-07 19:34:01,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 7631 events. 5257/7631 cut-off events. For 3336/3336 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 35738 event pairs, 4517 based on Foata normal form. 252/6821 useless extension candidates. Maximal degree in co-relation 18824. Up to 7601 conditions per place. [2024-11-07 19:34:01,390 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 61 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2024-11-07 19:34:01,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 424 flow [2024-11-07 19:34:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:34:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:34:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-07 19:34:01,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2866666666666667 [2024-11-07 19:34:01,391 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 302 flow. Second operand 4 states and 86 transitions. [2024-11-07 19:34:01,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 424 flow [2024-11-07 19:34:01,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:34:01,394 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 294 flow [2024-11-07 19:34:01,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-07 19:34:01,395 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-07 19:34:01,395 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 294 flow [2024-11-07 19:34:01,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:34:01,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:01,395 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:01,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:34:01,395 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:34:01,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash -412755686, now seen corresponding path program 1 times [2024-11-07 19:34:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:01,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617789195] [2024-11-07 19:34:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:34:01,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:01,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617789195] [2024-11-07 19:34:01,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617789195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:01,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339717030] [2024-11-07 19:34:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:01,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:01,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:01,543 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 19:34:01,544 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 19:34:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:01,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:34:01,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:34:01,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:34:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339717030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:01,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:34:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396858780] [2024-11-07 19:34:01,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:01,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 19:34:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 19:34:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-07 19:34:01,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-07 19:34:01,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 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 19:34:01,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:01,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-07 19:34:01,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:02,441 INFO L124 PetriNetUnfolderBase]: 6490/9672 cut-off events. [2024-11-07 19:34:02,442 INFO L125 PetriNetUnfolderBase]: For 4222/4222 co-relation queries the response was YES. [2024-11-07 19:34:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 9672 events. 6490/9672 cut-off events. For 4222/4222 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 48722 event pairs, 5339 based on Foata normal form. 345/8647 useless extension candidates. Maximal degree in co-relation 23596. Up to 7600 conditions per place. [2024-11-07 19:34:02,470 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 47 selfloop transitions, 16 changer transitions 60/127 dead transitions. [2024-11-07 19:34:02,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 765 flow [2024-11-07 19:34:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:34:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:34:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-11-07 19:34:02,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2966666666666667 [2024-11-07 19:34:02,472 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 294 flow. Second operand 12 states and 267 transitions. [2024-11-07 19:34:02,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 765 flow [2024-11-07 19:34:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 761 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:02,476 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 322 flow [2024-11-07 19:34:02,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2024-11-07 19:34:02,476 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2024-11-07 19:34:02,476 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 322 flow [2024-11-07 19:34:02,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 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 19:34:02,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:02,477 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:02,489 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 19:34:02,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:02,678 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-07 19:34:02,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1750360020, now seen corresponding path program 2 times [2024-11-07 19:34:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:02,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042974998] [2024-11-07 19:34:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042974998] [2024-11-07 19:34:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042974998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657683513] [2024-11-07 19:34:05,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:34:05,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:05,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:05,176 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 19:34:05,177 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 19:34:05,285 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:34:05,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:05,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-07 19:34:05,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:05,552 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 15 treesize of output 1 [2024-11-07 19:34:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:34:06,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:08,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:34:08,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 443 treesize of output 509 [2024-11-07 19:34:08,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:34:08,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 429 treesize of output 495