./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-symm.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/chl-nzb-file-symm.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', '48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5'] 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/chl-nzb-file-symm.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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:29:54,370 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:29:54,463 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:29:54,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:29:54,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:29:54,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:29:54,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:29:54,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:29:54,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:29:54,504 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:29:54,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:29:54,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:29:54,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:29:54,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:29:54,506 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:29:54,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:29:54,507 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:29:54,507 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:29:54,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:29:54,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:29:54,507 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:29:54,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:29:54,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:54,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:29:54,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:29:54,509 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 -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-07 19:29:54,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:29:54,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:29:54,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:29:54,798 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:29:54,798 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:29:54,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-07 19:29:56,079 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:29:56,290 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:29:56,291 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-07 19:29:56,301 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fa38ac84/cd1ee9a557cc4939ab6c5c745afbd1f5/FLAG60d3ca4ec [2024-11-07 19:29:56,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fa38ac84/cd1ee9a557cc4939ab6c5c745afbd1f5 [2024-11-07 19:29:56,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:29:56,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:29:56,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:56,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:29:56,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:29:56,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:56,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d43f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56, skipping insertion in model container [2024-11-07 19:29:56,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:56,673 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:29:56,822 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 19:29:56,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:56,835 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:29:56,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:56,909 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:29:56,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56 WrapperNode [2024-11-07 19:29:56,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:56,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:56,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:29:56,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:29:56,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:56,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:56,985 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2024-11-07 19:29:56,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:56,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:29:56,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:29:56,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:29:56,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,042 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:29:57,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:29:57,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:29:57,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:29:57,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:29:57,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (1/1) ... [2024-11-07 19:29:57,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:57,140 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 19:29:57,146 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 19:29:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:29:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:29:57,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:29:57,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:29:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:29:57,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:29:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:29:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:29:57,171 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 19:29:57,278 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:29:57,279 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:29:57,975 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:29:57,976 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:29:58,525 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:29:58,525 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:29:58,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:58 BoogieIcfgContainer [2024-11-07 19:29:58,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:29:58,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:29:58,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:29:58,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:29:58,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:29:56" (1/3) ... [2024-11-07 19:29:58,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa20896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:58, skipping insertion in model container [2024-11-07 19:29:58,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:56" (2/3) ... [2024-11-07 19:29:58,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa20896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:58, skipping insertion in model container [2024-11-07 19:29:58,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:58" (3/3) ... [2024-11-07 19:29:58,540 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-07 19:29:58,556 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:29:58,556 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-11-07 19:29:58,556 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:29:58,675 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:29:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-11-07 19:29:58,766 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-11-07 19:29:58,768 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:29:58,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-11-07 19:29:58,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-11-07 19:29:58,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-11-07 19:29:58,791 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:29:58,808 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;@287dd986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:29:58,808 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-11-07 19:29:58,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:29:58,814 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:29:58,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:29:58,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:58,815 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:58,816 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:29:58,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1300439, now seen corresponding path program 1 times [2024-11-07 19:29:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:58,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195776779] [2024-11-07 19:29:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:59,107 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 19:29:59,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195776779] [2024-11-07 19:29:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195776779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:59,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:29:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206138688] [2024-11-07 19:29:59,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:59,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:29:59,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:29:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:29:59,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-07 19:29:59,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 19:29:59,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:59,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-07 19:29:59,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:59,875 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-11-07 19:29:59,875 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-07 19:29:59,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-11-07 19:29:59,899 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-07 19:29:59,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-11-07 19:29:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:29:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:29:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-07 19:29:59,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-11-07 19:29:59,916 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-11-07 19:29:59,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-11-07 19:29:59,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:59,928 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-11-07 19:29:59,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-11-07 19:29:59,934 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-07 19:29:59,934 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-11-07 19:29:59,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 19:29:59,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:59,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:59,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:29:59,935 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:29:59,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1300440, now seen corresponding path program 1 times [2024-11-07 19:29:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:59,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521868657] [2024-11-07 19:29:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:59,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:00,226 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 19:30:00,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:00,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521868657] [2024-11-07 19:30:00,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521868657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:00,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:00,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:30:00,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013281437] [2024-11-07 19:30:00,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:00,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:00,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:00,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:00,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-07 19:30:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 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 19:30:00,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:00,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-07 19:30:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:00,757 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-11-07 19:30:00,757 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-07 19:30:00,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25213 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-11-07 19:30:00,780 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-07 19:30:00,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-11-07 19:30:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-07 19:30:00,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-11-07 19:30:00,783 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-11-07 19:30:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-11-07 19:30:00,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:00,788 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-11-07 19:30:00,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-07 19:30:00,790 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-11-07 19:30:00,790 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-11-07 19:30:00,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 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 19:30:00,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:00,791 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:30:00,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:30:00,791 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:00,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1249764370, now seen corresponding path program 1 times [2024-11-07 19:30:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254151101] [2024-11-07 19:30:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:00,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:01,141 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 19:30:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254151101] [2024-11-07 19:30:01,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254151101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971482660] [2024-11-07 19:30:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:01,145 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 19:30:01,147 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 19:30:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:01,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:30:01,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:01,295 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 19:30:01,363 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 19:30:01,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:01,441 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 19:30:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971482660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:01,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:01,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-07 19:30:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804354357] [2024-11-07 19:30:01,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:01,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:30:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:30:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:30:01,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-07 19:30:01,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 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 19:30:01,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:01,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-07 19:30:01,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:02,282 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-11-07 19:30:02,282 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-07 19:30:02,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25257 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-11-07 19:30:02,309 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-11-07 19:30:02,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-11-07 19:30:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-11-07 19:30:02,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-11-07 19:30:02,315 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-11-07 19:30:02,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-11-07 19:30:02,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:02,362 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-11-07 19:30:02,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-11-07 19:30:02,363 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-11-07 19:30:02,363 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-11-07 19:30:02,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 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 19:30:02,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:02,364 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-07 19:30:02,382 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 19:30:02,566 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 19:30:02,566 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:02,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1847960000, now seen corresponding path program 2 times [2024-11-07 19:30:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:02,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615340587] [2024-11-07 19:30:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615340587] [2024-11-07 19:30:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615340587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864699921] [2024-11-07 19:30:03,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:03,060 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 19:30:03,062 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 19:30:03,165 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:03,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:03,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:30:03,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:03,182 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 19:30:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:03,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864699921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:03,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-07 19:30:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099280597] [2024-11-07 19:30:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:03,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:30:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:30:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:30:04,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-07 19:30:04,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 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 19:30:04,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:04,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-07 19:30:04,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:06,094 INFO L124 PetriNetUnfolderBase]: 1454/3489 cut-off events. [2024-11-07 19:30:06,094 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-07 19:30:06,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5696 conditions, 3489 events. 1454/3489 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25342 event pairs, 790 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2095 conditions per place. [2024-11-07 19:30:06,117 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 68 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2024-11-07 19:30:06,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 596 flow [2024-11-07 19:30:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:30:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:30:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-11-07 19:30:06,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-11-07 19:30:06,121 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 7 states and 524 transitions. [2024-11-07 19:30:06,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 596 flow [2024-11-07 19:30:06,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 570 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:06,128 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 430 flow [2024-11-07 19:30:06,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-11-07 19:30:06,131 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-11-07 19:30:06,131 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 430 flow [2024-11-07 19:30:06,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 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 19:30:06,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:06,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:06,150 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 19:30:06,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:06,334 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:06,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 989591744, now seen corresponding path program 1 times [2024-11-07 19:30:06,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:06,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969267248] [2024-11-07 19:30:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:06,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:06,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969267248] [2024-11-07 19:30:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969267248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391259558] [2024-11-07 19:30:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:06,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:06,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:06,438 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 19:30:06,444 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 19:30:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:06,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:30:06,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:06,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391259558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:06,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-07 19:30:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846303656] [2024-11-07 19:30:06,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:06,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:30:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:30:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:30:06,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:06,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 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 19:30:06,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:06,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:07,072 INFO L124 PetriNetUnfolderBase]: 1448/3483 cut-off events. [2024-11-07 19:30:07,073 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-07 19:30:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 3483 events. 1448/3483 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25177 event pairs, 790 based on Foata normal form. 6/2654 useless extension candidates. Maximal degree in co-relation 5589. Up to 2090 conditions per place. [2024-11-07 19:30:07,098 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-11-07 19:30:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 557 flow [2024-11-07 19:30:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-11-07 19:30:07,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-07 19:30:07,100 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 430 flow. Second operand 6 states and 462 transitions. [2024-11-07 19:30:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 557 flow [2024-11-07 19:30:07,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 137 transitions, 528 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:07,106 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 409 flow [2024-11-07 19:30:07,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-11-07 19:30:07,109 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-11-07 19:30:07,109 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 409 flow [2024-11-07 19:30:07,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 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 19:30:07,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:07,110 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-07 19:30:07,127 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 19:30:07,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:07,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:07,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2068108282, now seen corresponding path program 3 times [2024-11-07 19:30:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736862837] [2024-11-07 19:30:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736862837] [2024-11-07 19:30:07,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736862837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833327030] [2024-11-07 19:30:07,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:30:07,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:07,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:07,462 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 19:30:07,463 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 19:30:07,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:30:07,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:07,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 19:30:07,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:07,568 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 19:30:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-07 19:30:07,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-07 19:30:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833327030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:07,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-07 19:30:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340785523] [2024-11-07 19:30:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:07,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:30:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:30:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:30:08,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-07 19:30:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 409 flow. Second operand has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 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 19:30:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-07 19:30:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:08,978 INFO L124 PetriNetUnfolderBase]: 1446/3477 cut-off events. [2024-11-07 19:30:08,978 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-07 19:30:08,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 3477 events. 1446/3477 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25146 event pairs, 790 based on Foata normal form. 2/2644 useless extension candidates. Maximal degree in co-relation 5587. Up to 2084 conditions per place. [2024-11-07 19:30:08,995 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 55 selfloop transitions, 21 changer transitions 0/133 dead transitions. [2024-11-07 19:30:08,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 133 transitions, 539 flow [2024-11-07 19:30:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 19:30:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-07 19:30:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 760 transitions. [2024-11-07 19:30:08,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483405483405484 [2024-11-07 19:30:08,999 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 409 flow. Second operand 11 states and 760 transitions. [2024-11-07 19:30:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 133 transitions, 539 flow [2024-11-07 19:30:09,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 133 transitions, 507 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-07 19:30:09,005 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 405 flow [2024-11-07 19:30:09,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-11-07 19:30:09,007 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-11-07 19:30:09,008 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 405 flow [2024-11-07 19:30:09,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 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 19:30:09,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:09,009 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:09,025 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 19:30:09,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-07 19:30:09,209 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:09,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash 610411437, now seen corresponding path program 2 times [2024-11-07 19:30:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:09,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584131335] [2024-11-07 19:30:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:09,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-07 19:30:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584131335] [2024-11-07 19:30:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584131335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868527983] [2024-11-07 19:30:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:09,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:09,401 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 19:30:09,404 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 19:30:09,503 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:30:09,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:09,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-07 19:30:09,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:09,515 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 8 treesize of output 1 [2024-11-07 19:30:09,524 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 19:30:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:09,596 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 14 treesize of output 9 [2024-11-07 19:30:09,612 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:30:09,612 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 19:30:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-07 19:30:09,698 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:09,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868527983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:09,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:09,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-11-07 19:30:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504666442] [2024-11-07 19:30:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:09,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:30:09,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-11-07 19:30:09,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 405 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 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 19:30:09,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:09,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-11-07 19:30:09,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:10,609 INFO L124 PetriNetUnfolderBase]: 3171/6786 cut-off events. [2024-11-07 19:30:10,609 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-07 19:30:10,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 6786 events. 3171/6786 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 48102 event pairs, 1228 based on Foata normal form. 0/5445 useless extension candidates. Maximal degree in co-relation 11460. Up to 2561 conditions per place. [2024-11-07 19:30:10,639 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2024-11-07 19:30:10,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 752 flow [2024-11-07 19:30:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-11-07 19:30:10,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-11-07 19:30:10,643 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 405 flow. Second operand 6 states and 461 transitions. [2024-11-07 19:30:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 752 flow [2024-11-07 19:30:10,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 178 transitions, 681 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-11-07 19:30:10,649 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 362 flow [2024-11-07 19:30:10,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-11-07 19:30:10,651 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-11-07 19:30:10,651 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 362 flow [2024-11-07 19:30:10,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 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 19:30:10,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:10,652 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:10,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:30:10,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:10,852 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:10,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 610411436, now seen corresponding path program 1 times [2024-11-07 19:30:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653322126] [2024-11-07 19:30:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-07 19:30:11,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:11,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653322126] [2024-11-07 19:30:11,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653322126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:11,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466408046] [2024-11-07 19:30:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:11,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:11,011 INFO L229 MonitoredProcess]: Starting monitored process 7 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 19:30:11,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-07 19:30:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:11,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:30:11,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-07 19:30:11,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-07 19:30:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466408046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:11,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:30:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852807548] [2024-11-07 19:30:11,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:11,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:11,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:11,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:11,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 362 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 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 19:30:11,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:11,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:11,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:11,988 INFO L124 PetriNetUnfolderBase]: 2756/6501 cut-off events. [2024-11-07 19:30:11,988 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2024-11-07 19:30:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10868 conditions, 6501 events. 2756/6501 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 49033 event pairs, 1536 based on Foata normal form. 2/5155 useless extension candidates. Maximal degree in co-relation 10795. Up to 3984 conditions per place. [2024-11-07 19:30:12,022 INFO L140 encePairwiseOnDemand]: 121/126 looper letters, 63 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-11-07 19:30:12,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 132 transitions, 516 flow [2024-11-07 19:30:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:30:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:30:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-11-07 19:30:12,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-11-07 19:30:12,025 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 362 flow. Second operand 7 states and 524 transitions. [2024-11-07 19:30:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 132 transitions, 516 flow [2024-11-07 19:30:12,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 132 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:12,029 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 366 flow [2024-11-07 19:30:12,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-11-07 19:30:12,031 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-11-07 19:30:12,032 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 366 flow [2024-11-07 19:30:12,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 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 19:30:12,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:12,033 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:12,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:30:12,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-07 19:30:12,234 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:12,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash -820950917, now seen corresponding path program 2 times [2024-11-07 19:30:12,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:12,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783305876] [2024-11-07 19:30:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:12,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-07 19:30:12,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:12,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783305876] [2024-11-07 19:30:12,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783305876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:12,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:12,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313051582] [2024-11-07 19:30:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:12,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:12,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:12,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-07 19:30:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 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 19:30:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:12,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-07 19:30:12,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:13,133 INFO L124 PetriNetUnfolderBase]: 2756/6139 cut-off events. [2024-11-07 19:30:13,134 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-07 19:30:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10459 conditions, 6139 events. 2756/6139 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 43887 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10379. Up to 3981 conditions per place. [2024-11-07 19:30:13,161 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 70 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-07 19:30:13,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 496 flow [2024-11-07 19:30:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-11-07 19:30:13,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-07 19:30:13,163 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 366 flow. Second operand 5 states and 336 transitions. [2024-11-07 19:30:13,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 122 transitions, 496 flow [2024-11-07 19:30:13,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 122 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:30:13,167 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 332 flow [2024-11-07 19:30:13,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-11-07 19:30:13,168 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2024-11-07 19:30:13,168 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 332 flow [2024-11-07 19:30:13,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 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 19:30:13,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:13,169 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:13,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:30:13,169 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:13,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 612564798, now seen corresponding path program 1 times [2024-11-07 19:30:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958162778] [2024-11-07 19:30:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:13,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-07 19:30:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958162778] [2024-11-07 19:30:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958162778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:13,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:13,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:13,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315196075] [2024-11-07 19:30:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:13,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:13,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-07 19:30:13,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:13,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:13,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-07 19:30:13,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:13,796 INFO L124 PetriNetUnfolderBase]: 2756/5801 cut-off events. [2024-11-07 19:30:13,796 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-11-07 19:30:13,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10112 conditions, 5801 events. 2756/5801 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 38939 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10039. Up to 3981 conditions per place. [2024-11-07 19:30:13,818 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 71 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-07 19:30:13,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 114 transitions, 462 flow [2024-11-07 19:30:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-07 19:30:13,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-07 19:30:13,820 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 332 flow. Second operand 4 states and 282 transitions. [2024-11-07 19:30:13,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 114 transitions, 462 flow [2024-11-07 19:30:13,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:13,822 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 315 flow [2024-11-07 19:30:13,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-11-07 19:30:13,823 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2024-11-07 19:30:13,823 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 315 flow [2024-11-07 19:30:13,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:13,823 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:13,823 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:13,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:30:13,823 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:13,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 612564799, now seen corresponding path program 1 times [2024-11-07 19:30:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894834273] [2024-11-07 19:30:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:30:14,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894834273] [2024-11-07 19:30:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894834273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818103372] [2024-11-07 19:30:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:14,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:14,196 INFO L229 MonitoredProcess]: Starting monitored process 8 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 19:30:14,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 19:30:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:14,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:30:14,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:30:14,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:14,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-07 19:30:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:30:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818103372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:14,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:14,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-07 19:30:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572185673] [2024-11-07 19:30:14,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:14,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:30:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:30:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:30:15,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:15,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 315 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 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 19:30:15,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:15,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:15,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:16,983 INFO L124 PetriNetUnfolderBase]: 6335/12030 cut-off events. [2024-11-07 19:30:16,983 INFO L125 PetriNetUnfolderBase]: For 373/373 co-relation queries the response was YES. [2024-11-07 19:30:16,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21814 conditions, 12030 events. 6335/12030 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 82248 event pairs, 1161 based on Foata normal form. 0/10496 useless extension candidates. Maximal degree in co-relation 21742. Up to 3752 conditions per place. [2024-11-07 19:30:17,033 INFO L140 encePairwiseOnDemand]: 114/126 looper letters, 140 selfloop transitions, 15 changer transitions 0/192 dead transitions. [2024-11-07 19:30:17,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 192 transitions, 809 flow [2024-11-07 19:30:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:30:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:30:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 760 transitions. [2024-11-07 19:30:17,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-07 19:30:17,036 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 315 flow. Second operand 10 states and 760 transitions. [2024-11-07 19:30:17,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 192 transitions, 809 flow [2024-11-07 19:30:17,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 192 transitions, 806 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:17,040 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 355 flow [2024-11-07 19:30:17,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=355, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-11-07 19:30:17,041 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2024-11-07 19:30:17,041 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 355 flow [2024-11-07 19:30:17,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 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 19:30:17,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:17,042 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:17,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:30:17,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:17,246 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:17,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1340197152, now seen corresponding path program 1 times [2024-11-07 19:30:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840814657] [2024-11-07 19:30:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:17,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:30:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840814657] [2024-11-07 19:30:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840814657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559812549] [2024-11-07 19:30:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:17,646 INFO L229 MonitoredProcess]: Starting monitored process 9 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 19:30:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-07 19:30:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:17,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:30:17,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:30:17,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:18,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-07 19:30:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:30:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559812549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:18,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:18,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-07 19:30:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671951642] [2024-11-07 19:30:18,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:18,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:30:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:30:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:30:19,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:19,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 355 flow. Second operand has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 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 19:30:19,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:19,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:19,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:20,725 INFO L124 PetriNetUnfolderBase]: 9458/18099 cut-off events. [2024-11-07 19:30:20,725 INFO L125 PetriNetUnfolderBase]: For 2121/2199 co-relation queries the response was YES. [2024-11-07 19:30:20,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34540 conditions, 18099 events. 9458/18099 cut-off events. For 2121/2199 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 129737 event pairs, 2682 based on Foata normal form. 0/15482 useless extension candidates. Maximal degree in co-relation 34458. Up to 5035 conditions per place. [2024-11-07 19:30:20,800 INFO L140 encePairwiseOnDemand]: 111/126 looper letters, 160 selfloop transitions, 18 changer transitions 0/212 dead transitions. [2024-11-07 19:30:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 212 transitions, 965 flow [2024-11-07 19:30:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:30:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:30:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2024-11-07 19:30:20,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-07 19:30:20,805 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 355 flow. Second operand 10 states and 780 transitions. [2024-11-07 19:30:20,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 212 transitions, 965 flow [2024-11-07 19:30:20,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 212 transitions, 944 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:30:20,813 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 423 flow [2024-11-07 19:30:20,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=423, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2024-11-07 19:30:20,813 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-11-07 19:30:20,814 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 423 flow [2024-11-07 19:30:20,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 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 19:30:20,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:20,814 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:20,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-07 19:30:21,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:21,015 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:21,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash 264298883, now seen corresponding path program 1 times [2024-11-07 19:30:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:21,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009244803] [2024-11-07 19:30:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:30:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009244803] [2024-11-07 19:30:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009244803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302189327] [2024-11-07 19:30:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:21,336 INFO L229 MonitoredProcess]: Starting monitored process 10 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 19:30:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-07 19:30:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:21,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-07 19:30:21,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:21,479 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 19:30:21,616 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-07 19:30:21,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-07 19:30:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:21,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:30:22,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302189327] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:22,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:30:22,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 14] total 27 [2024-11-07 19:30:22,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879090707] [2024-11-07 19:30:22,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:22,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:30:22,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:30:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-11-07 19:30:22,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:22,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 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 19:30:22,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:22,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:22,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:24,182 INFO L124 PetriNetUnfolderBase]: 11437/20897 cut-off events. [2024-11-07 19:30:24,183 INFO L125 PetriNetUnfolderBase]: For 6526/6896 co-relation queries the response was YES. [2024-11-07 19:30:24,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42458 conditions, 20897 events. 11437/20897 cut-off events. For 6526/6896 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 148032 event pairs, 4244 based on Foata normal form. 0/17841 useless extension candidates. Maximal degree in co-relation 42373. Up to 8345 conditions per place. [2024-11-07 19:30:24,300 INFO L140 encePairwiseOnDemand]: 113/126 looper letters, 125 selfloop transitions, 10 changer transitions 0/169 dead transitions. [2024-11-07 19:30:24,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 849 flow [2024-11-07 19:30:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-11-07 19:30:24,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-11-07 19:30:24,302 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 423 flow. Second operand 6 states and 471 transitions. [2024-11-07 19:30:24,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 849 flow [2024-11-07 19:30:24,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 824 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-07 19:30:24,314 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 467 flow [2024-11-07 19:30:24,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-11-07 19:30:24,315 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-11-07 19:30:24,315 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 467 flow [2024-11-07 19:30:24,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 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 19:30:24,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:24,315 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:24,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 19:30:24,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:24,516 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:24,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 996480192, now seen corresponding path program 1 times [2024-11-07 19:30:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764906983] [2024-11-07 19:30:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:25,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764906983] [2024-11-07 19:30:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764906983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:25,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025055860] [2024-11-07 19:30:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:25,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:25,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:25,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 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 19:30:25,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:25,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:25,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:26,752 INFO L124 PetriNetUnfolderBase]: 11072/20729 cut-off events. [2024-11-07 19:30:26,752 INFO L125 PetriNetUnfolderBase]: For 10637/10999 co-relation queries the response was YES. [2024-11-07 19:30:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44788 conditions, 20729 events. 11072/20729 cut-off events. For 10637/10999 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 149450 event pairs, 6581 based on Foata normal form. 1/18204 useless extension candidates. Maximal degree in co-relation 44707. Up to 15445 conditions per place. [2024-11-07 19:30:26,851 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 119 selfloop transitions, 1 changer transitions 6/164 dead transitions. [2024-11-07 19:30:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 866 flow [2024-11-07 19:30:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-11-07 19:30:26,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2024-11-07 19:30:26,852 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 467 flow. Second operand 4 states and 349 transitions. [2024-11-07 19:30:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 866 flow [2024-11-07 19:30:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 164 transitions, 861 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:26,863 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 469 flow [2024-11-07 19:30:26,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-11-07 19:30:26,863 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 7 predicate places. [2024-11-07 19:30:26,864 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 469 flow [2024-11-07 19:30:26,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 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 19:30:26,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:26,864 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:26,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:30:26,864 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:26,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash -635832396, now seen corresponding path program 2 times [2024-11-07 19:30:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075932265] [2024-11-07 19:30:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:27,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075932265] [2024-11-07 19:30:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075932265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:27,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:27,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:27,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128238241] [2024-11-07 19:30:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:27,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:27,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:27,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 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 19:30:27,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:27,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:27,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:30,081 INFO L124 PetriNetUnfolderBase]: 20176/37083 cut-off events. [2024-11-07 19:30:30,081 INFO L125 PetriNetUnfolderBase]: For 19202/19985 co-relation queries the response was YES. [2024-11-07 19:30:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81344 conditions, 37083 events. 20176/37083 cut-off events. For 19202/19985 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 292132 event pairs, 5667 based on Foata normal form. 1/33009 useless extension candidates. Maximal degree in co-relation 81263. Up to 15477 conditions per place. [2024-11-07 19:30:30,293 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 147 selfloop transitions, 10 changer transitions 2/197 dead transitions. [2024-11-07 19:30:30,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 197 transitions, 1053 flow [2024-11-07 19:30:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2024-11-07 19:30:30,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.748015873015873 [2024-11-07 19:30:30,294 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 469 flow. Second operand 4 states and 377 transitions. [2024-11-07 19:30:30,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 197 transitions, 1053 flow [2024-11-07 19:30:30,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 1047 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:30,313 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 561 flow [2024-11-07 19:30:30,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=561, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-11-07 19:30:30,314 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-11-07 19:30:30,314 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 561 flow [2024-11-07 19:30:30,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 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 19:30:30,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:30,314 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:30,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:30:30,315 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:30,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -612142141, now seen corresponding path program 1 times [2024-11-07 19:30:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:30,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967700376] [2024-11-07 19:30:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967700376] [2024-11-07 19:30:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967700376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:30,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:30,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279195532] [2024-11-07 19:30:30,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:30,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:30,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:30,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:30,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:33,837 INFO L124 PetriNetUnfolderBase]: 19274/36642 cut-off events. [2024-11-07 19:30:33,837 INFO L125 PetriNetUnfolderBase]: For 25001/25868 co-relation queries the response was YES. [2024-11-07 19:30:33,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83365 conditions, 36642 events. 19274/36642 cut-off events. For 25001/25868 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 297481 event pairs, 6374 based on Foata normal form. 159/32072 useless extension candidates. Maximal degree in co-relation 83283. Up to 28009 conditions per place. [2024-11-07 19:30:34,035 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 98 selfloop transitions, 3 changer transitions 2/141 dead transitions. [2024-11-07 19:30:34,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 141 transitions, 790 flow [2024-11-07 19:30:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-07 19:30:34,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6957671957671958 [2024-11-07 19:30:34,036 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 561 flow. Second operand 3 states and 263 transitions. [2024-11-07 19:30:34,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 141 transitions, 790 flow [2024-11-07 19:30:34,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 141 transitions, 790 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:30:34,054 INFO L231 Difference]: Finished difference. Result has 124 places, 131 transitions, 573 flow [2024-11-07 19:30:34,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=573, PETRI_PLACES=124, PETRI_TRANSITIONS=131} [2024-11-07 19:30:34,054 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 14 predicate places. [2024-11-07 19:30:34,054 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 131 transitions, 573 flow [2024-11-07 19:30:34,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:34,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:34,055 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:34,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:30:34,055 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:34,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 307697650, now seen corresponding path program 1 times [2024-11-07 19:30:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:34,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777893498] [2024-11-07 19:30:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:34,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:34,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777893498] [2024-11-07 19:30:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777893498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:34,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:34,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529532211] [2024-11-07 19:30:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:34,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:34,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:34,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 131 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:34,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:34,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:34,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:37,412 INFO L124 PetriNetUnfolderBase]: 18976/35934 cut-off events. [2024-11-07 19:30:37,412 INFO L125 PetriNetUnfolderBase]: For 24859/25726 co-relation queries the response was YES. [2024-11-07 19:30:37,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81946 conditions, 35934 events. 18976/35934 cut-off events. For 24859/25726 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 290048 event pairs, 10766 based on Foata normal form. 9/31314 useless extension candidates. Maximal degree in co-relation 81862. Up to 27562 conditions per place. [2024-11-07 19:30:37,668 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 90 selfloop transitions, 0 changer transitions 10/138 dead transitions. [2024-11-07 19:30:37,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 138 transitions, 778 flow [2024-11-07 19:30:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-11-07 19:30:37,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2024-11-07 19:30:37,670 INFO L175 Difference]: Start difference. First operand has 124 places, 131 transitions, 573 flow. Second operand 3 states and 260 transitions. [2024-11-07 19:30:37,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 138 transitions, 778 flow [2024-11-07 19:30:37,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 766 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:37,691 INFO L231 Difference]: Finished difference. Result has 123 places, 128 transitions, 535 flow [2024-11-07 19:30:37,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=535, PETRI_PLACES=123, PETRI_TRANSITIONS=128} [2024-11-07 19:30:37,692 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-11-07 19:30:37,692 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 128 transitions, 535 flow [2024-11-07 19:30:37,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:37,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:37,692 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 19:30:37,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:30:37,693 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:37,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1365374999, now seen corresponding path program 1 times [2024-11-07 19:30:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:37,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423123249] [2024-11-07 19:30:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:37,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423123249] [2024-11-07 19:30:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423123249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:37,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:37,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:37,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796579662] [2024-11-07 19:30:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:37,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:37,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-07 19:30:37,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 128 transitions, 535 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 19:30:37,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:37,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-07 19:30:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:41,464 INFO L124 PetriNetUnfolderBase]: 18276/35501 cut-off events. [2024-11-07 19:30:41,464 INFO L125 PetriNetUnfolderBase]: For 22552/23396 co-relation queries the response was YES. [2024-11-07 19:30:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80990 conditions, 35501 events. 18276/35501 cut-off events. For 22552/23396 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 296247 event pairs, 9326 based on Foata normal form. 200/31255 useless extension candidates. Maximal degree in co-relation 80971. Up to 22266 conditions per place. [2024-11-07 19:30:41,671 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 130 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-07 19:30:41,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 978 flow [2024-11-07 19:30:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-07 19:30:41,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-11-07 19:30:41,672 INFO L175 Difference]: Start difference. First operand has 123 places, 128 transitions, 535 flow. Second operand 3 states and 282 transitions. [2024-11-07 19:30:41,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 978 flow [2024-11-07 19:30:41,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 172 transitions, 974 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:41,693 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 549 flow [2024-11-07 19:30:41,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=549, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-11-07 19:30:41,693 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-11-07 19:30:41,693 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 549 flow [2024-11-07 19:30:41,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 19:30:41,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:41,694 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:41,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:30:41,694 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:41,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1185376447, now seen corresponding path program 1 times [2024-11-07 19:30:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:41,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117081102] [2024-11-07 19:30:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:41,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:41,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117081102] [2024-11-07 19:30:41,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117081102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:41,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 19:30:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852742561] [2024-11-07 19:30:41,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:41,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:30:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:30:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-07 19:30:41,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:41,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:41,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:41,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:46,498 INFO L124 PetriNetUnfolderBase]: 27444/48251 cut-off events. [2024-11-07 19:30:46,498 INFO L125 PetriNetUnfolderBase]: For 32053/33503 co-relation queries the response was YES. [2024-11-07 19:30:46,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117536 conditions, 48251 events. 27444/48251 cut-off events. For 32053/33503 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 382410 event pairs, 10864 based on Foata normal form. 0/43453 useless extension candidates. Maximal degree in co-relation 117516. Up to 26098 conditions per place. [2024-11-07 19:30:46,759 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 237 selfloop transitions, 8 changer transitions 0/278 dead transitions. [2024-11-07 19:30:46,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 278 transitions, 1676 flow [2024-11-07 19:30:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-07 19:30:46,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-11-07 19:30:46,761 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 549 flow. Second operand 6 states and 528 transitions. [2024-11-07 19:30:46,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 278 transitions, 1676 flow [2024-11-07 19:30:46,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 278 transitions, 1670 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:46,783 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 583 flow [2024-11-07 19:30:46,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2024-11-07 19:30:46,784 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 19 predicate places. [2024-11-07 19:30:46,784 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 583 flow [2024-11-07 19:30:46,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:46,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:46,785 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:46,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-07 19:30:46,785 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:46,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash -302967060, now seen corresponding path program 1 times [2024-11-07 19:30:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:46,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636780523] [2024-11-07 19:30:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636780523] [2024-11-07 19:30:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636780523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:46,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:46,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:30:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897040627] [2024-11-07 19:30:46,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:46,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:46,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:46,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 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 19:30:46,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:46,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:46,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:51,295 INFO L124 PetriNetUnfolderBase]: 27130/47879 cut-off events. [2024-11-07 19:30:51,296 INFO L125 PetriNetUnfolderBase]: For 37772/39156 co-relation queries the response was YES. [2024-11-07 19:30:51,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122233 conditions, 47879 events. 27130/47879 cut-off events. For 37772/39156 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 378880 event pairs, 10063 based on Foata normal form. 428/45037 useless extension candidates. Maximal degree in co-relation 122210. Up to 21155 conditions per place. [2024-11-07 19:30:51,595 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 192 selfloop transitions, 13 changer transitions 0/238 dead transitions. [2024-11-07 19:30:51,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 238 transitions, 1460 flow [2024-11-07 19:30:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2024-11-07 19:30:51,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-11-07 19:30:51,596 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 583 flow. Second operand 5 states and 438 transitions. [2024-11-07 19:30:51,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 238 transitions, 1460 flow [2024-11-07 19:30:51,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 1453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:51,663 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 622 flow [2024-11-07 19:30:51,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=622, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2024-11-07 19:30:51,663 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 23 predicate places. [2024-11-07 19:30:51,663 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 622 flow [2024-11-07 19:30:51,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 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 19:30:51,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:51,664 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:51,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-07 19:30:51,664 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:30:51,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -830229087, now seen corresponding path program 1 times [2024-11-07 19:30:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:51,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465116089] [2024-11-07 19:30:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:51,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-07 19:30:52,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465116089] [2024-11-07 19:30:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465116089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343037992] [2024-11-07 19:30:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:52,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:52,127 INFO L229 MonitoredProcess]: Starting monitored process 11 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 19:30:52,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 19:30:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:52,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:30:52,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:52,343 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343037992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:52,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-07 19:30:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293827503] [2024-11-07 19:30:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:52,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:30:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:30:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:52,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:30:52,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 622 flow. Second operand has 6 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 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 19:30:52,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:52,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:30:52,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:59,018 INFO L124 PetriNetUnfolderBase]: 36744/65245 cut-off events. [2024-11-07 19:30:59,018 INFO L125 PetriNetUnfolderBase]: For 68534/70648 co-relation queries the response was YES. [2024-11-07 19:30:59,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174436 conditions, 65245 events. 36744/65245 cut-off events. For 68534/70648 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 544837 event pairs, 14312 based on Foata normal form. 630/61617 useless extension candidates. Maximal degree in co-relation 174412. Up to 30768 conditions per place. [2024-11-07 19:30:59,639 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 318 selfloop transitions, 12 changer transitions 0/363 dead transitions. [2024-11-07 19:30:59,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 363 transitions, 2291 flow [2024-11-07 19:30:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:30:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:30:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 708 transitions. [2024-11-07 19:30:59,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-11-07 19:30:59,641 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 622 flow. Second operand 8 states and 708 transitions. [2024-11-07 19:30:59,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 363 transitions, 2291 flow [2024-11-07 19:30:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 363 transitions, 2272 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:59,859 INFO L231 Difference]: Finished difference. Result has 141 places, 135 transitions, 669 flow [2024-11-07 19:30:59,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=669, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2024-11-07 19:30:59,860 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 31 predicate places. [2024-11-07 19:30:59,860 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 669 flow [2024-11-07 19:30:59,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 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 19:30:59,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:59,860 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-07 19:30:59,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 19:31:00,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:00,061 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-07 19:31:00,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -441653110, now seen corresponding path program 1 times [2024-11-07 19:31:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:00,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184384149] [2024-11-07 19:31:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:31:00,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184384149] [2024-11-07 19:31:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184384149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:31:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389891728] [2024-11-07 19:31:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:00,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:31:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:31:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:31:00,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-07 19:31:00,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 669 flow. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 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 19:31:00,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:00,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-07 19:31:00,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand