./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.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/unroll-cond-2.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', '4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b'] 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/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:39:53,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:39:54,074 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:39:54,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:39:54,081 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:39:54,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:39:54,107 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:39:54,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:39:54,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:39:54,108 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:39:54,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:39:54,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:39:54,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:39:54,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:39:54,110 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:39:54,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:39:54,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:39:54,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:39:54,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:39:54,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:39:54,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:39:54,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:39:54,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:39:54,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:39:54,112 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 -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-07 19:39:54,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:39:54,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:39:54,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:39:54,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:39:54,395 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:39:54,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-07 19:39:55,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:39:55,876 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:39:55,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-07 19:39:55,887 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d0579bb74/4aa3fd773be3421e850c91b326fac45b/FLAG4afa32587 [2024-11-07 19:39:55,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d0579bb74/4aa3fd773be3421e850c91b326fac45b [2024-11-07 19:39:55,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:39:55,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:39:55,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:39:55,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:39:55,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:39:55,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:55" (1/1) ... [2024-11-07 19:39:55,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e603aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:55, skipping insertion in model container [2024-11-07 19:39:55,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:55" (1/1) ... [2024-11-07 19:39:55,942 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:39:56,116 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 19:39:56,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:39:56,132 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:39:56,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:39:56,174 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:39:56,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56 WrapperNode [2024-11-07 19:39:56,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:39:56,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:39:56,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:39:56,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:39:56,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,216 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 136 [2024-11-07 19:39:56,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:39:56,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:39:56,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:39:56,220 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:39:56,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,257 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-07 19:39:56,257 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,257 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,263 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:39:56,277 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:39:56,277 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:39:56,277 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:39:56,278 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (1/1) ... [2024-11-07 19:39:56,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:39:56,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:56,308 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 19:39:56,310 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 19:39:56,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:39:56,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:39:56,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:39:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:39:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:39:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:39:56,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:39:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:39:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:39:56,333 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 19:39:56,438 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:39:56,440 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:39:56,770 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:39:56,771 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:39:56,986 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:39:56,986 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-07 19:39:56,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:56 BoogieIcfgContainer [2024-11-07 19:39:56,986 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:39:56,988 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:39:56,988 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:39:56,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:39:56,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:39:55" (1/3) ... [2024-11-07 19:39:56,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc1075c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:56, skipping insertion in model container [2024-11-07 19:39:56,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:56" (2/3) ... [2024-11-07 19:39:56,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc1075c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:56, skipping insertion in model container [2024-11-07 19:39:56,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:56" (3/3) ... [2024-11-07 19:39:57,001 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-07 19:39:57,013 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:39:57,013 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-07 19:39:57,013 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:39:57,072 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:39:57,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-07 19:39:57,135 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-07 19:39:57,143 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:39:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-07 19:39:57,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-07 19:39:57,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-07 19:39:57,160 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:39:57,177 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;@7eb5402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:39:57,177 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-07 19:39:57,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:39:57,184 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:39:57,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:39:57,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:57,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:39:57,187 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:57,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 466718, now seen corresponding path program 1 times [2024-11-07 19:39:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:57,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345826972] [2024-11-07 19:39:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:57,411 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 19:39:57,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345826972] [2024-11-07 19:39:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345826972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:57,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:57,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:39:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836111293] [2024-11-07 19:39:57,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:57,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:39:57,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:39:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:39:57,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:39:57,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 19:39:57,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:57,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:39:57,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:57,609 INFO L124 PetriNetUnfolderBase]: 110/249 cut-off events. [2024-11-07 19:39:57,609 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-07 19:39:57,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 249 events. 110/249 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1075 event pairs, 75 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 396. Up to 185 conditions per place. [2024-11-07 19:39:57,613 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-07 19:39:57,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 126 flow [2024-11-07 19:39:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:39:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:39:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-07 19:39:57,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-07 19:39:57,626 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 67 transitions. [2024-11-07 19:39:57,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 126 flow [2024-11-07 19:39:57,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:39:57,633 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 76 flow [2024-11-07 19:39:57,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-07 19:39:57,640 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-07 19:39:57,641 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 76 flow [2024-11-07 19:39:57,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 19:39:57,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:57,642 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:39:57,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:39:57,642 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:57,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 466719, now seen corresponding path program 1 times [2024-11-07 19:39:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:57,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152443320] [2024-11-07 19:39:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:57,982 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 19:39:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152443320] [2024-11-07 19:39:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152443320] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:57,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:57,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041072140] [2024-11-07 19:39:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:57,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:39:58,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:39:58,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 19:39:58,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:58,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:39:58,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:58,155 INFO L124 PetriNetUnfolderBase]: 111/252 cut-off events. [2024-11-07 19:39:58,155 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:39:58,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 252 events. 111/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1089 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 432. Up to 190 conditions per place. [2024-11-07 19:39:58,157 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 24 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-07 19:39:58,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 138 flow [2024-11-07 19:39:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:39:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:39:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-07 19:39:58,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-07 19:39:58,160 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-11-07 19:39:58,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 138 flow [2024-11-07 19:39:58,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:58,162 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 91 flow [2024-11-07 19:39:58,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-07 19:39:58,163 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-07 19:39:58,163 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 91 flow [2024-11-07 19:39:58,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 19:39:58,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:58,165 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:39:58,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:39:58,166 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:58,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash 448532008, now seen corresponding path program 1 times [2024-11-07 19:39:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389717609] [2024-11-07 19:39:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:58,485 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 19:39:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389717609] [2024-11-07 19:39:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389717609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704523233] [2024-11-07 19:39:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:58,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:58,489 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 19:39:58,491 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 19:39:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:58,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:39:58,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:58,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:39:58,820 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 19:39:58,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:58,949 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 19:39:58,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704523233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:58,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:58,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:39:58,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054299407] [2024-11-07 19:39:58,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:58,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:39:58,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:39:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:39:59,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:39:59,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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 19:39:59,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:59,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:39:59,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:59,368 INFO L124 PetriNetUnfolderBase]: 112/254 cut-off events. [2024-11-07 19:39:59,368 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:39:59,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 254 events. 112/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1094 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 432. Up to 187 conditions per place. [2024-11-07 19:39:59,371 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2024-11-07 19:39:59,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 157 flow [2024-11-07 19:39:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:39:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:39:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-11-07 19:39:59,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-11-07 19:39:59,373 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 91 flow. Second operand 7 states and 129 transitions. [2024-11-07 19:39:59,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 157 flow [2024-11-07 19:39:59,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:39:59,374 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 116 flow [2024-11-07 19:39:59,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-07 19:39:59,375 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-11-07 19:39:59,375 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 116 flow [2024-11-07 19:39:59,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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 19:39:59,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:59,376 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:39:59,393 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 19:39:59,580 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 19:39:59,581 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:59,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:59,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976845, now seen corresponding path program 1 times [2024-11-07 19:39:59,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:59,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104480328] [2024-11-07 19:39:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:59,662 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 19:39:59,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104480328] [2024-11-07 19:39:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104480328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:59,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:59,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:59,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182003400] [2024-11-07 19:39:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:59,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:59,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:39:59,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-07 19:39:59,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 19:39:59,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:59,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-07 19:39:59,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:59,757 INFO L124 PetriNetUnfolderBase]: 112/228 cut-off events. [2024-11-07 19:39:59,757 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:39:59,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 228 events. 112/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 840 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 406. Up to 186 conditions per place. [2024-11-07 19:39:59,759 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 25 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-07 19:39:59,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 166 flow [2024-11-07 19:39:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-07 19:39:59,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-07 19:39:59,763 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 116 flow. Second operand 4 states and 67 transitions. [2024-11-07 19:39:59,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 166 flow [2024-11-07 19:39:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 148 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-07 19:39:59,765 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 98 flow [2024-11-07 19:39:59,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-07 19:39:59,766 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-07 19:39:59,766 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 98 flow [2024-11-07 19:39:59,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 19:39:59,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:59,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:39:59,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:39:59,768 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:59,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976846, now seen corresponding path program 1 times [2024-11-07 19:39:59,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:59,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255795397] [2024-11-07 19:39:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:59,831 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 19:39:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255795397] [2024-11-07 19:39:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255795397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844064549] [2024-11-07 19:39:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:59,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:39:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:39:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:39:59,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-07 19:39:59,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:59,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:59,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-07 19:39:59,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:59,907 INFO L124 PetriNetUnfolderBase]: 111/227 cut-off events. [2024-11-07 19:39:59,907 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:39:59,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 227 events. 111/227 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 829 event pairs, 75 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 406. Up to 191 conditions per place. [2024-11-07 19:39:59,909 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 26 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-07 19:39:59,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 149 flow [2024-11-07 19:39:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:39:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:39:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-07 19:39:59,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-07 19:39:59,911 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 98 flow. Second operand 3 states and 71 transitions. [2024-11-07 19:39:59,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 149 flow [2024-11-07 19:39:59,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:59,912 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 93 flow [2024-11-07 19:39:59,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-07 19:39:59,913 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-07 19:39:59,913 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 93 flow [2024-11-07 19:39:59,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:59,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:59,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:59,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:39:59,913 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:39:59,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 576645477, now seen corresponding path program 1 times [2024-11-07 19:39:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217427182] [2024-11-07 19:39:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:59,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217427182] [2024-11-07 19:40:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217427182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098022429] [2024-11-07 19:40:00,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:00,111 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 19:40:00,112 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 19:40:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:00,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:40:00,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:00,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:00,338 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 29 treesize of output 25 [2024-11-07 19:40:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098022429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:00,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:40:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792728031] [2024-11-07 19:40:00,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:00,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:40:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:40:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:40:00,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 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 19:40:00,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:00,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:00,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:00,688 INFO L124 PetriNetUnfolderBase]: 232/429 cut-off events. [2024-11-07 19:40:00,688 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-07 19:40:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 429 events. 232/429 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1812 event pairs, 82 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 833. Up to 220 conditions per place. [2024-11-07 19:40:00,691 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 41 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-07 19:40:00,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-07 19:40:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-07 19:40:00,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-07 19:40:00,694 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 93 flow. Second operand 5 states and 114 transitions. [2024-11-07 19:40:00,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-07 19:40:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:40:00,696 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 108 flow [2024-11-07 19:40:00,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-07 19:40:00,696 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-11-07 19:40:00,696 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 108 flow [2024-11-07 19:40:00,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 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 19:40:00,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:00,697 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:00,714 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 19:40:00,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:00,898 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:00,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash 105537385, now seen corresponding path program 1 times [2024-11-07 19:40:00,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:00,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644398222] [2024-11-07 19:40:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:01,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644398222] [2024-11-07 19:40:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644398222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283817328] [2024-11-07 19:40:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:01,132 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 19:40:01,134 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 19:40:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:01,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-07 19:40:01,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:01,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:01,414 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 36 treesize of output 32 [2024-11-07 19:40:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283817328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:01,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-07 19:40:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666476596] [2024-11-07 19:40:01,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:01,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:40:01,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:40:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:40:01,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:01,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 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 19:40:01,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:01,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:01,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:02,464 INFO L124 PetriNetUnfolderBase]: 508/980 cut-off events. [2024-11-07 19:40:02,464 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-07 19:40:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 980 events. 508/980 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5256 event pairs, 236 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 1096. Up to 372 conditions per place. [2024-11-07 19:40:02,469 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-11-07 19:40:02,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 398 flow [2024-11-07 19:40:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:40:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:40:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-07 19:40:02,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-11-07 19:40:02,471 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 108 flow. Second operand 8 states and 194 transitions. [2024-11-07 19:40:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 398 flow [2024-11-07 19:40:02,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 88 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:40:02,473 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 168 flow [2024-11-07 19:40:02,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-07 19:40:02,474 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2024-11-07 19:40:02,474 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 168 flow [2024-11-07 19:40:02,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 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 19:40:02,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:02,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:02,492 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 19:40:02,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:02,676 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:02,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 84923166, now seen corresponding path program 1 times [2024-11-07 19:40:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880559577] [2024-11-07 19:40:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:02,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880559577] [2024-11-07 19:40:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880559577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762303170] [2024-11-07 19:40:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:02,862 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 19:40:02,864 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 19:40:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:02,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:40:02,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:03,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:03,081 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 29 treesize of output 25 [2024-11-07 19:40:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762303170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:03,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:40:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201893792] [2024-11-07 19:40:03,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:03,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:40:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:40:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:40:03,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-07 19:40:03,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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 19:40:03,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:03,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-07 19:40:03,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:03,456 INFO L124 PetriNetUnfolderBase]: 831/1437 cut-off events. [2024-11-07 19:40:03,456 INFO L125 PetriNetUnfolderBase]: For 830/890 co-relation queries the response was YES. [2024-11-07 19:40:03,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1437 events. 831/1437 cut-off events. For 830/890 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7126 event pairs, 246 based on Foata normal form. 64/1403 useless extension candidates. Maximal degree in co-relation 2294. Up to 853 conditions per place. [2024-11-07 19:40:03,476 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-11-07 19:40:03,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 338 flow [2024-11-07 19:40:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-07 19:40:03,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-07 19:40:03,477 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 168 flow. Second operand 5 states and 104 transitions. [2024-11-07 19:40:03,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 338 flow [2024-11-07 19:40:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 331 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:40:03,479 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 199 flow [2024-11-07 19:40:03,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-07 19:40:03,480 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-11-07 19:40:03,480 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 199 flow [2024-11-07 19:40:03,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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 19:40:03,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:03,481 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:03,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-07 19:40:03,685 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,SelfDestructingSolverStorable7 [2024-11-07 19:40:03,686 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:03,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1662348661, now seen corresponding path program 1 times [2024-11-07 19:40:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130867140] [2024-11-07 19:40:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130867140] [2024-11-07 19:40:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130867140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756912464] [2024-11-07 19:40:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:03,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:03,841 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 19:40:03,843 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 19:40:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:03,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-07 19:40:03,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:04,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:04,035 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 29 treesize of output 25 [2024-11-07 19:40:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:04,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756912464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:04,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:04,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-07 19:40:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856923187] [2024-11-07 19:40:04,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:04,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:40:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:40:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:40:04,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-07 19:40:04,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 19:40:04,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:04,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-07 19:40:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:04,650 INFO L124 PetriNetUnfolderBase]: 853/1466 cut-off events. [2024-11-07 19:40:04,650 INFO L125 PetriNetUnfolderBase]: For 982/1069 co-relation queries the response was YES. [2024-11-07 19:40:04,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 1466 events. 853/1466 cut-off events. For 982/1069 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7278 event pairs, 426 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 2484. Up to 1107 conditions per place. [2024-11-07 19:40:04,660 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-07 19:40:04,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 456 flow [2024-11-07 19:40:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:40:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:40:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-11-07 19:40:04,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-07 19:40:04,661 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 199 flow. Second operand 7 states and 152 transitions. [2024-11-07 19:40:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 456 flow [2024-11-07 19:40:04,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-07 19:40:04,665 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 225 flow [2024-11-07 19:40:04,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-07 19:40:04,666 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-11-07 19:40:04,666 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 225 flow [2024-11-07 19:40:04,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 19:40:04,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:04,666 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:04,682 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 19:40:04,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:04,871 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:04,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 417670208, now seen corresponding path program 2 times [2024-11-07 19:40:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114933631] [2024-11-07 19:40:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:40:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114933631] [2024-11-07 19:40:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114933631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64702647] [2024-11-07 19:40:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:05,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:05,047 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 19:40:05,048 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 19:40:05,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:40:05,112 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:05,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:40:05,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:05,128 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 19:40:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:40:05,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:40:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64702647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:05,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:05,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-07 19:40:05,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502650229] [2024-11-07 19:40:05,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:05,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 19:40:05,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 19:40:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-07 19:40:05,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:05,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 225 flow. Second operand has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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 19:40:05,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:05,991 INFO L124 PetriNetUnfolderBase]: 708/1292 cut-off events. [2024-11-07 19:40:05,991 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-11-07 19:40:05,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 1292 events. 708/1292 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6945 event pairs, 383 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2224. Up to 867 conditions per place. [2024-11-07 19:40:05,999 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 46 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-07 19:40:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 409 flow [2024-11-07 19:40:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-07 19:40:06,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-07 19:40:06,000 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 225 flow. Second operand 5 states and 105 transitions. [2024-11-07 19:40:06,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 409 flow [2024-11-07 19:40:06,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 386 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:40:06,005 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 221 flow [2024-11-07 19:40:06,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-07 19:40:06,005 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-11-07 19:40:06,006 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 221 flow [2024-11-07 19:40:06,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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 19:40:06,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:06,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:06,022 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 19:40:06,207 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,SelfDestructingSolverStorable9 [2024-11-07 19:40:06,207 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:06,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash -576165740, now seen corresponding path program 2 times [2024-11-07 19:40:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:06,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588816941] [2024-11-07 19:40:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:40:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588816941] [2024-11-07 19:40:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588816941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684120314] [2024-11-07 19:40:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:06,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:06,403 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 19:40:06,405 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 19:40:06,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:40:06,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:06,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-07 19:40:06,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:06,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:40:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:06,728 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:40:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684120314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:06,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:40:06,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-07 19:40:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821493416] [2024-11-07 19:40:06,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:06,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:40:06,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:40:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:40:06,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-07 19:40:06,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 19:40:06,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:06,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-07 19:40:06,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:07,062 INFO L124 PetriNetUnfolderBase]: 877/1503 cut-off events. [2024-11-07 19:40:07,062 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2024-11-07 19:40:07,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4233 conditions, 1503 events. 877/1503 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7427 event pairs, 162 based on Foata normal form. 0/1341 useless extension candidates. Maximal degree in co-relation 2716. Up to 853 conditions per place. [2024-11-07 19:40:07,070 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 59 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-07 19:40:07,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 496 flow [2024-11-07 19:40:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-07 19:40:07,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-07 19:40:07,072 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 221 flow. Second operand 5 states and 108 transitions. [2024-11-07 19:40:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 496 flow [2024-11-07 19:40:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 452 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:40:07,075 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 248 flow [2024-11-07 19:40:07,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-07 19:40:07,076 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-11-07 19:40:07,076 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 248 flow [2024-11-07 19:40:07,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 19:40:07,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:07,076 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:07,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-07 19:40:07,282 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 19:40:07,282 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:07,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash 210786255, now seen corresponding path program 1 times [2024-11-07 19:40:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:07,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174177021] [2024-11-07 19:40:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:07,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:07,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174177021] [2024-11-07 19:40:07,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174177021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132628687] [2024-11-07 19:40:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:07,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:07,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:07,459 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 19:40:07,461 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 19:40:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:07,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-07 19:40:07,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:07,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:07,733 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 36 treesize of output 32 [2024-11-07 19:40:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:07,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132628687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:07,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:07,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-07 19:40:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208978685] [2024-11-07 19:40:07,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:07,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:40:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:40:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:40:08,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-07 19:40:08,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 248 flow. Second operand has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 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 19:40:08,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:08,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-07 19:40:08,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:08,513 INFO L124 PetriNetUnfolderBase]: 808/1386 cut-off events. [2024-11-07 19:40:08,513 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2024-11-07 19:40:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1386 events. 808/1386 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6697 event pairs, 438 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 2790. Up to 720 conditions per place. [2024-11-07 19:40:08,522 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 77 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-11-07 19:40:08,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 94 transitions, 589 flow [2024-11-07 19:40:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:40:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:40:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-11-07 19:40:08,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-11-07 19:40:08,523 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 248 flow. Second operand 8 states and 178 transitions. [2024-11-07 19:40:08,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 94 transitions, 589 flow [2024-11-07 19:40:08,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:40:08,528 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 316 flow [2024-11-07 19:40:08,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-11-07 19:40:08,529 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 19 predicate places. [2024-11-07 19:40:08,529 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 316 flow [2024-11-07 19:40:08,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 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 19:40:08,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:08,529 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:08,545 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 19:40:08,729 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 19:40:08,730 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:08,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash 355520408, now seen corresponding path program 2 times [2024-11-07 19:40:08,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:08,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806078346] [2024-11-07 19:40:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:40:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806078346] [2024-11-07 19:40:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806078346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077707077] [2024-11-07 19:40:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:08,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:08,918 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 19:40:08,920 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 19:40:08,991 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:40:08,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:08,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:40:08,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:08,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:40:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:40:09,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:40:09,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077707077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:09,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:09,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-07 19:40:09,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548752287] [2024-11-07 19:40:09,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:09,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 19:40:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 19:40:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-07 19:40:09,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-07 19:40:09,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 316 flow. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 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 19:40:09,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:09,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-07 19:40:09,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:09,813 INFO L124 PetriNetUnfolderBase]: 729/1259 cut-off events. [2024-11-07 19:40:09,813 INFO L125 PetriNetUnfolderBase]: For 1706/1706 co-relation queries the response was YES. [2024-11-07 19:40:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3848 conditions, 1259 events. 729/1259 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6092 event pairs, 322 based on Foata normal form. 16/1273 useless extension candidates. Maximal degree in co-relation 2570. Up to 732 conditions per place. [2024-11-07 19:40:09,822 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-11-07 19:40:09,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 470 flow [2024-11-07 19:40:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-07 19:40:09,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-07 19:40:09,824 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 316 flow. Second operand 5 states and 92 transitions. [2024-11-07 19:40:09,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 470 flow [2024-11-07 19:40:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 450 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-07 19:40:09,830 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 313 flow [2024-11-07 19:40:09,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-11-07 19:40:09,832 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-11-07 19:40:09,832 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 313 flow [2024-11-07 19:40:09,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 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 19:40:09,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:09,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:09,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-07 19:40:10,034 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 19:40:10,034 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:10,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1319414913, now seen corresponding path program 1 times [2024-11-07 19:40:10,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:10,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67193580] [2024-11-07 19:40:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67193580] [2024-11-07 19:40:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67193580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:10,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:40:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890466574] [2024-11-07 19:40:10,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:10,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:40:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:40:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:40:10,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-07 19:40:10,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:40:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-07 19:40:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:10,200 INFO L124 PetriNetUnfolderBase]: 739/1259 cut-off events. [2024-11-07 19:40:10,201 INFO L125 PetriNetUnfolderBase]: For 2034/2034 co-relation queries the response was YES. [2024-11-07 19:40:10,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 1259 events. 739/1259 cut-off events. For 2034/2034 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5984 event pairs, 208 based on Foata normal form. 2/1261 useless extension candidates. Maximal degree in co-relation 2742. Up to 943 conditions per place. [2024-11-07 19:40:10,209 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 54 selfloop transitions, 7 changer transitions 1/64 dead transitions. [2024-11-07 19:40:10,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 504 flow [2024-11-07 19:40:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:40:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:40:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-07 19:40:10,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-07 19:40:10,210 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 313 flow. Second operand 3 states and 85 transitions. [2024-11-07 19:40:10,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 504 flow [2024-11-07 19:40:10,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:40:10,218 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 328 flow [2024-11-07 19:40:10,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-07 19:40:10,220 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2024-11-07 19:40:10,221 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 328 flow [2024-11-07 19:40:10,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:40:10,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:10,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:10,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:40:10,221 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:10,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -936127283, now seen corresponding path program 1 times [2024-11-07 19:40:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326020933] [2024-11-07 19:40:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:10,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:10,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326020933] [2024-11-07 19:40:10,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326020933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:10,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:10,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:40:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893866990] [2024-11-07 19:40:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:10,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:40:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:40:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:40:10,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-07 19:40:10,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 19:40:10,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:10,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-07 19:40:10,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:10,520 INFO L124 PetriNetUnfolderBase]: 721/1251 cut-off events. [2024-11-07 19:40:10,520 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-11-07 19:40:10,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1251 events. 721/1251 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6438 event pairs, 266 based on Foata normal form. 18/1269 useless extension candidates. Maximal degree in co-relation 2697. Up to 686 conditions per place. [2024-11-07 19:40:10,526 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 9 changer transitions 0/104 dead transitions. [2024-11-07 19:40:10,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 871 flow [2024-11-07 19:40:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-07 19:40:10,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-11-07 19:40:10,528 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 328 flow. Second operand 5 states and 131 transitions. [2024-11-07 19:40:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 871 flow [2024-11-07 19:40:10,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 104 transitions, 848 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-07 19:40:10,532 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 392 flow [2024-11-07 19:40:10,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-07 19:40:10,532 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-11-07 19:40:10,533 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 392 flow [2024-11-07 19:40:10,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 19:40:10,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:10,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:10,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:40:10,533 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:10,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 452279287, now seen corresponding path program 2 times [2024-11-07 19:40:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817740972] [2024-11-07 19:40:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:10,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817740972] [2024-11-07 19:40:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817740972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:10,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-07 19:40:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142522145] [2024-11-07 19:40:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:10,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:40:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:40:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:40:10,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:10,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 19:40:10,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:10,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:10,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:10,897 INFO L124 PetriNetUnfolderBase]: 767/1317 cut-off events. [2024-11-07 19:40:10,897 INFO L125 PetriNetUnfolderBase]: For 3187/3187 co-relation queries the response was YES. [2024-11-07 19:40:10,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1317 events. 767/1317 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6409 event pairs, 183 based on Foata normal form. 60/1377 useless extension candidates. Maximal degree in co-relation 3221. Up to 618 conditions per place. [2024-11-07 19:40:10,906 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 92 selfloop transitions, 28 changer transitions 0/121 dead transitions. [2024-11-07 19:40:10,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 121 transitions, 1045 flow [2024-11-07 19:40:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:40:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:40:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-07 19:40:10,908 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-11-07 19:40:10,908 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 392 flow. Second operand 8 states and 191 transitions. [2024-11-07 19:40:10,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 121 transitions, 1045 flow [2024-11-07 19:40:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 1011 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-07 19:40:10,916 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 659 flow [2024-11-07 19:40:10,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=659, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-11-07 19:40:10,918 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-11-07 19:40:10,918 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 659 flow [2024-11-07 19:40:10,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 19:40:10,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:10,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:10,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:40:10,919 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:10,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -344928779, now seen corresponding path program 3 times [2024-11-07 19:40:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:10,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942624029] [2024-11-07 19:40:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:11,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942624029] [2024-11-07 19:40:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942624029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:11,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:11,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:40:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585725487] [2024-11-07 19:40:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:11,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:40:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:40:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:40:11,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:11,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 659 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:40:11,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:11,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:11,249 INFO L124 PetriNetUnfolderBase]: 859/1467 cut-off events. [2024-11-07 19:40:11,249 INFO L125 PetriNetUnfolderBase]: For 6568/6568 co-relation queries the response was YES. [2024-11-07 19:40:11,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6605 conditions, 1467 events. 859/1467 cut-off events. For 6568/6568 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7506 event pairs, 266 based on Foata normal form. 8/1475 useless extension candidates. Maximal degree in co-relation 4336. Up to 708 conditions per place. [2024-11-07 19:40:11,261 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 97 selfloop transitions, 31 changer transitions 1/130 dead transitions. [2024-11-07 19:40:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 130 transitions, 1446 flow [2024-11-07 19:40:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-07 19:40:11,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-07 19:40:11,262 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 659 flow. Second operand 5 states and 130 transitions. [2024-11-07 19:40:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 130 transitions, 1446 flow [2024-11-07 19:40:11,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1391 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-11-07 19:40:11,278 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 975 flow [2024-11-07 19:40:11,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=975, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-11-07 19:40:11,279 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 38 predicate places. [2024-11-07 19:40:11,279 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 975 flow [2024-11-07 19:40:11,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:40:11,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:11,280 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:11,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:40:11,280 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:11,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash 882412917, now seen corresponding path program 4 times [2024-11-07 19:40:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811922377] [2024-11-07 19:40:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:11,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:11,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811922377] [2024-11-07 19:40:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811922377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:11,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:11,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:40:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717311044] [2024-11-07 19:40:11,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:11,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:40:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:40:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:40:11,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:11,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 975 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:40:11,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:11,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:11,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:11,611 INFO L124 PetriNetUnfolderBase]: 853/1459 cut-off events. [2024-11-07 19:40:11,611 INFO L125 PetriNetUnfolderBase]: For 8086/8086 co-relation queries the response was YES. [2024-11-07 19:40:11,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 1459 events. 853/1459 cut-off events. For 8086/8086 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7270 event pairs, 360 based on Foata normal form. 8/1467 useless extension candidates. Maximal degree in co-relation 4878. Up to 984 conditions per place. [2024-11-07 19:40:11,624 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 75 selfloop transitions, 42 changer transitions 1/119 dead transitions. [2024-11-07 19:40:11,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 1489 flow [2024-11-07 19:40:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:40:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:40:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-07 19:40:11,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-07 19:40:11,625 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 975 flow. Second operand 5 states and 124 transitions. [2024-11-07 19:40:11,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 1489 flow [2024-11-07 19:40:11,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1465 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-07 19:40:11,650 INFO L231 Difference]: Finished difference. Result has 84 places, 101 transitions, 1272 flow [2024-11-07 19:40:11,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1272, PETRI_PLACES=84, PETRI_TRANSITIONS=101} [2024-11-07 19:40:11,650 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-11-07 19:40:11,650 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 101 transitions, 1272 flow [2024-11-07 19:40:11,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 19:40:11,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:11,651 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:11,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:40:11,651 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:11,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1473294665, now seen corresponding path program 5 times [2024-11-07 19:40:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883434054] [2024-11-07 19:40:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:40:11,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883434054] [2024-11-07 19:40:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883434054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:40:11,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:40:11,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 19:40:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095379690] [2024-11-07 19:40:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:11,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:40:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:40:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-07 19:40:11,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:11,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 101 transitions, 1272 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 19:40:11,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:11,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:12,029 INFO L124 PetriNetUnfolderBase]: 843/1433 cut-off events. [2024-11-07 19:40:12,029 INFO L125 PetriNetUnfolderBase]: For 9345/9345 co-relation queries the response was YES. [2024-11-07 19:40:12,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 1433 events. 843/1433 cut-off events. For 9345/9345 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7221 event pairs, 242 based on Foata normal form. 12/1445 useless extension candidates. Maximal degree in co-relation 5248. Up to 708 conditions per place. [2024-11-07 19:40:12,040 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 41 changer transitions 1/155 dead transitions. [2024-11-07 19:40:12,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1926 flow [2024-11-07 19:40:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:40:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:40:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-11-07 19:40:12,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-07 19:40:12,044 INFO L175 Difference]: Start difference. First operand has 84 places, 101 transitions, 1272 flow. Second operand 6 states and 156 transitions. [2024-11-07 19:40:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1926 flow [2024-11-07 19:40:12,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 155 transitions, 1860 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-07 19:40:12,075 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 1385 flow [2024-11-07 19:40:12,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1385, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-11-07 19:40:12,075 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2024-11-07 19:40:12,076 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 1385 flow [2024-11-07 19:40:12,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 19:40:12,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:12,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:12,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-07 19:40:12,076 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:12,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1203485320, now seen corresponding path program 1 times [2024-11-07 19:40:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:12,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288318352] [2024-11-07 19:40:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:12,234 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 19:40:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288318352] [2024-11-07 19:40:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288318352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092731925] [2024-11-07 19:40:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:12,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:12,237 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 19:40:12,239 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 19:40:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:12,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-07 19:40:12,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:12,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-07 19:40:12,443 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 19:40:12,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:12,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-07 19:40:12,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:40:12,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-11-07 19:40:12,961 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 19:40:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092731925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:12,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-11-07 19:40:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791737356] [2024-11-07 19:40:12,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:12,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:40:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:40:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:40:13,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-07 19:40:13,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 1385 flow. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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 19:40:13,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:13,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-07 19:40:13,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:14,795 INFO L124 PetriNetUnfolderBase]: 2665/4619 cut-off events. [2024-11-07 19:40:14,795 INFO L125 PetriNetUnfolderBase]: For 22279/22279 co-relation queries the response was YES. [2024-11-07 19:40:14,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20344 conditions, 4619 events. 2665/4619 cut-off events. For 22279/22279 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 27067 event pairs, 56 based on Foata normal form. 24/4643 useless extension candidates. Maximal degree in co-relation 18204. Up to 767 conditions per place. [2024-11-07 19:40:14,819 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 280 selfloop transitions, 143 changer transitions 140/565 dead transitions. [2024-11-07 19:40:14,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 565 transitions, 5805 flow [2024-11-07 19:40:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-07 19:40:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-07 19:40:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1157 transitions. [2024-11-07 19:40:14,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6026041666666667 [2024-11-07 19:40:14,827 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 1385 flow. Second operand 48 states and 1157 transitions. [2024-11-07 19:40:14,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 565 transitions, 5805 flow [2024-11-07 19:40:14,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 565 transitions, 5683 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-07 19:40:14,901 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 2459 flow [2024-11-07 19:40:14,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2459, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-11-07 19:40:14,901 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-11-07 19:40:14,901 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 2459 flow [2024-11-07 19:40:14,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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 19:40:14,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:14,902 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:14,918 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 19:40:15,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:15,102 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:15,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -128894715, now seen corresponding path program 1 times [2024-11-07 19:40:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36269231] [2024-11-07 19:40:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:15,248 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 19:40:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36269231] [2024-11-07 19:40:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36269231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482337597] [2024-11-07 19:40:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:15,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:15,251 INFO L229 MonitoredProcess]: Starting monitored process 12 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 19:40:15,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-07 19:40:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:15,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:40:15,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:15,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-07 19:40:15,382 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 19:40:15,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:15,406 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:40:15,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-07 19:40:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:40:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482337597] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:15,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:40:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2024-11-07 19:40:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800459893] [2024-11-07 19:40:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:40:15,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:40:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:40:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:40:15,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-07 19:40:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 2459 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-07 19:40:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:15,965 INFO L124 PetriNetUnfolderBase]: 2413/4212 cut-off events. [2024-11-07 19:40:15,966 INFO L125 PetriNetUnfolderBase]: For 24116/24116 co-relation queries the response was YES. [2024-11-07 19:40:15,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19943 conditions, 4212 events. 2413/4212 cut-off events. For 24116/24116 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 24362 event pairs, 841 based on Foata normal form. 4/4216 useless extension candidates. Maximal degree in co-relation 19767. Up to 3170 conditions per place. [2024-11-07 19:40:15,989 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 193 selfloop transitions, 51 changer transitions 1/247 dead transitions. [2024-11-07 19:40:15,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 247 transitions, 3372 flow [2024-11-07 19:40:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:40:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:40:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-07 19:40:15,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-11-07 19:40:15,990 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 2459 flow. Second operand 4 states and 116 transitions. [2024-11-07 19:40:15,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 247 transitions, 3372 flow [2024-11-07 19:40:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 247 transitions, 2962 flow, removed 147 selfloop flow, removed 17 redundant places. [2024-11-07 19:40:16,068 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 2445 flow [2024-11-07 19:40:16,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2445, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2024-11-07 19:40:16,069 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-11-07 19:40:16,069 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 2445 flow [2024-11-07 19:40:16,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:16,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:16,069 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:16,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-07 19:40:16,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-07 19:40:16,274 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:16,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1686743607, now seen corresponding path program 2 times [2024-11-07 19:40:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996929188] [2024-11-07 19:40:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:16,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996929188] [2024-11-07 19:40:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996929188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287804564] [2024-11-07 19:40:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:16,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:16,412 INFO L229 MonitoredProcess]: Starting monitored process 13 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 19:40:16,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-07 19:40:16,529 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:40:16,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:16,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:16,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:16,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287804564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:16,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-07 19:40:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486059014] [2024-11-07 19:40:16,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:16,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:40:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:40:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:40:16,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:16,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 2445 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 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 19:40:16,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:16,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:18,029 INFO L124 PetriNetUnfolderBase]: 3052/5364 cut-off events. [2024-11-07 19:40:18,030 INFO L125 PetriNetUnfolderBase]: For 23276/23276 co-relation queries the response was YES. [2024-11-07 19:40:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23656 conditions, 5364 events. 3052/5364 cut-off events. For 23276/23276 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 32547 event pairs, 535 based on Foata normal form. 15/5379 useless extension candidates. Maximal degree in co-relation 23058. Up to 1536 conditions per place. [2024-11-07 19:40:18,065 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 271 selfloop transitions, 206 changer transitions 4/482 dead transitions. [2024-11-07 19:40:18,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 482 transitions, 5475 flow [2024-11-07 19:40:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-07 19:40:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-07 19:40:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 576 transitions. [2024-11-07 19:40:18,067 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-07 19:40:18,067 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 2445 flow. Second operand 27 states and 576 transitions. [2024-11-07 19:40:18,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 482 transitions, 5475 flow [2024-11-07 19:40:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 482 transitions, 5437 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-11-07 19:40:18,152 INFO L231 Difference]: Finished difference. Result has 163 places, 311 transitions, 3991 flow [2024-11-07 19:40:18,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3991, PETRI_PLACES=163, PETRI_TRANSITIONS=311} [2024-11-07 19:40:18,152 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-11-07 19:40:18,152 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 311 transitions, 3991 flow [2024-11-07 19:40:18,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 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 19:40:18,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:18,153 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:18,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 19:40:18,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:18,353 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:18,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1588302485, now seen corresponding path program 3 times [2024-11-07 19:40:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120940027] [2024-11-07 19:40:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120940027] [2024-11-07 19:40:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120940027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606231978] [2024-11-07 19:40:18,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:40:18,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:18,540 INFO L229 MonitoredProcess]: Starting monitored process 14 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 19:40:18,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-07 19:40:18,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:40:18,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:18,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:18,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:18,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:18,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606231978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:18,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-07 19:40:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309835636] [2024-11-07 19:40:18,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:18,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:40:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:40:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:40:18,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:18,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 311 transitions, 3991 flow. Second operand has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 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 19:40:18,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:18,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:18,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:20,818 INFO L124 PetriNetUnfolderBase]: 4867/8562 cut-off events. [2024-11-07 19:40:20,818 INFO L125 PetriNetUnfolderBase]: For 51557/51557 co-relation queries the response was YES. [2024-11-07 19:40:20,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 8562 events. 4867/8562 cut-off events. For 51557/51557 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 55675 event pairs, 443 based on Foata normal form. 18/8580 useless extension candidates. Maximal degree in co-relation 39918. Up to 1500 conditions per place. [2024-11-07 19:40:20,869 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 382 selfloop transitions, 496 changer transitions 1/880 dead transitions. [2024-11-07 19:40:20,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 880 transitions, 11691 flow [2024-11-07 19:40:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-07 19:40:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-07 19:40:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 738 transitions. [2024-11-07 19:40:20,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-11-07 19:40:20,872 INFO L175 Difference]: Start difference. First operand has 163 places, 311 transitions, 3991 flow. Second operand 33 states and 738 transitions. [2024-11-07 19:40:20,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 880 transitions, 11691 flow [2024-11-07 19:40:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 880 transitions, 11271 flow, removed 210 selfloop flow, removed 0 redundant places. [2024-11-07 19:40:21,152 INFO L231 Difference]: Finished difference. Result has 220 places, 659 transitions, 10019 flow [2024-11-07 19:40:21,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10019, PETRI_PLACES=220, PETRI_TRANSITIONS=659} [2024-11-07 19:40:21,153 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-11-07 19:40:21,153 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 659 transitions, 10019 flow [2024-11-07 19:40:21,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 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 19:40:21,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:21,153 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:21,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-07 19:40:21,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:21,354 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:21,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 386298489, now seen corresponding path program 4 times [2024-11-07 19:40:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:21,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509463672] [2024-11-07 19:40:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:21,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509463672] [2024-11-07 19:40:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509463672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539500933] [2024-11-07 19:40:21,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:40:21,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:21,498 INFO L229 MonitoredProcess]: Starting monitored process 15 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 19:40:21,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-07 19:40:21,671 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:40:21,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:21,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:21,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:21,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539500933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:21,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-07 19:40:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450228354] [2024-11-07 19:40:21,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:21,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:40:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:40:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:40:21,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:21,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 659 transitions, 10019 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 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 19:40:21,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:21,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:21,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:26,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-07 19:40:28,457 INFO L124 PetriNetUnfolderBase]: 4938/8753 cut-off events. [2024-11-07 19:40:28,458 INFO L125 PetriNetUnfolderBase]: For 84599/84599 co-relation queries the response was YES. [2024-11-07 19:40:28,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53332 conditions, 8753 events. 4938/8753 cut-off events. For 84599/84599 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 57911 event pairs, 908 based on Foata normal form. 18/8771 useless extension candidates. Maximal degree in co-relation 52348. Up to 2866 conditions per place. [2024-11-07 19:40:28,545 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 516 selfloop transitions, 425 changer transitions 9/951 dead transitions. [2024-11-07 19:40:28,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 951 transitions, 15123 flow [2024-11-07 19:40:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-07 19:40:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-07 19:40:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 556 transitions. [2024-11-07 19:40:28,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2024-11-07 19:40:28,547 INFO L175 Difference]: Start difference. First operand has 220 places, 659 transitions, 10019 flow. Second operand 27 states and 556 transitions. [2024-11-07 19:40:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 951 transitions, 15123 flow [2024-11-07 19:40:29,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 951 transitions, 14525 flow, removed 299 selfloop flow, removed 0 redundant places. [2024-11-07 19:40:29,224 INFO L231 Difference]: Finished difference. Result has 256 places, 724 transitions, 11748 flow [2024-11-07 19:40:29,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9621, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11748, PETRI_PLACES=256, PETRI_TRANSITIONS=724} [2024-11-07 19:40:29,225 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 216 predicate places. [2024-11-07 19:40:29,225 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 724 transitions, 11748 flow [2024-11-07 19:40:29,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 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 19:40:29,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:29,226 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:29,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-07 19:40:29,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-07 19:40:29,427 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:29,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash -349391455, now seen corresponding path program 5 times [2024-11-07 19:40:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122326489] [2024-11-07 19:40:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122326489] [2024-11-07 19:40:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122326489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494223959] [2024-11-07 19:40:29,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:40:29,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:29,598 INFO L229 MonitoredProcess]: Starting monitored process 16 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 19:40:29,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 19:40:29,749 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 19:40:29,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:29,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:29,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:29,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494223959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:29,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-07 19:40:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578438188] [2024-11-07 19:40:29,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:29,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:40:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:40:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:40:29,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 724 transitions, 11748 flow. Second operand has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 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 19:40:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:33,528 INFO L124 PetriNetUnfolderBase]: 5878/10473 cut-off events. [2024-11-07 19:40:33,529 INFO L125 PetriNetUnfolderBase]: For 121795/121795 co-relation queries the response was YES. [2024-11-07 19:40:33,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68056 conditions, 10473 events. 5878/10473 cut-off events. For 121795/121795 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 72990 event pairs, 1255 based on Foata normal form. 24/10497 useless extension candidates. Maximal degree in co-relation 66441. Up to 3883 conditions per place. [2024-11-07 19:40:33,623 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 424 selfloop transitions, 859 changer transitions 1/1285 dead transitions. [2024-11-07 19:40:33,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1285 transitions, 21337 flow [2024-11-07 19:40:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-07 19:40:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-07 19:40:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 907 transitions. [2024-11-07 19:40:33,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.566875 [2024-11-07 19:40:33,626 INFO L175 Difference]: Start difference. First operand has 256 places, 724 transitions, 11748 flow. Second operand 40 states and 907 transitions. [2024-11-07 19:40:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1285 transitions, 21337 flow [2024-11-07 19:40:34,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1285 transitions, 20498 flow, removed 108 selfloop flow, removed 9 redundant places. [2024-11-07 19:40:34,840 INFO L231 Difference]: Finished difference. Result has 306 places, 1108 transitions, 20196 flow [2024-11-07 19:40:34,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11195, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20196, PETRI_PLACES=306, PETRI_TRANSITIONS=1108} [2024-11-07 19:40:34,841 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-11-07 19:40:34,841 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 1108 transitions, 20196 flow [2024-11-07 19:40:34,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 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 19:40:34,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:34,841 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:34,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 19:40:35,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-07 19:40:35,042 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:35,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1181411821, now seen corresponding path program 6 times [2024-11-07 19:40:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:35,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363519438] [2024-11-07 19:40:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:35,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:35,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:35,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363519438] [2024-11-07 19:40:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363519438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:35,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380258785] [2024-11-07 19:40:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:40:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:35,226 INFO L229 MonitoredProcess]: Starting monitored process 17 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 19:40:35,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 19:40:35,349 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-07 19:40:35,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:35,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:35,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:35,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380258785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-07 19:40:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020228112] [2024-11-07 19:40:35,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:35,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:40:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:40:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:40:35,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:35,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1108 transitions, 20196 flow. Second operand has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 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 19:40:35,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:35,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:40,029 INFO L124 PetriNetUnfolderBase]: 6112/10846 cut-off events. [2024-11-07 19:40:40,029 INFO L125 PetriNetUnfolderBase]: For 149068/149068 co-relation queries the response was YES. [2024-11-07 19:40:40,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77277 conditions, 10846 events. 6112/10846 cut-off events. For 149068/149068 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 75473 event pairs, 1359 based on Foata normal form. 114/10960 useless extension candidates. Maximal degree in co-relation 76786. Up to 4021 conditions per place. [2024-11-07 19:40:40,159 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 709 selfloop transitions, 658 changer transitions 1/1369 dead transitions. [2024-11-07 19:40:40,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1369 transitions, 26135 flow [2024-11-07 19:40:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-07 19:40:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-07 19:40:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 682 transitions. [2024-11-07 19:40:40,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-07 19:40:40,161 INFO L175 Difference]: Start difference. First operand has 306 places, 1108 transitions, 20196 flow. Second operand 31 states and 682 transitions. [2024-11-07 19:40:40,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1369 transitions, 26135 flow [2024-11-07 19:40:42,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1369 transitions, 24373 flow, removed 578 selfloop flow, removed 9 redundant places. [2024-11-07 19:40:42,184 INFO L231 Difference]: Finished difference. Result has 338 places, 1182 transitions, 22056 flow [2024-11-07 19:40:42,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18411, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22056, PETRI_PLACES=338, PETRI_TRANSITIONS=1182} [2024-11-07 19:40:42,185 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 298 predicate places. [2024-11-07 19:40:42,186 INFO L471 AbstractCegarLoop]: Abstraction has has 338 places, 1182 transitions, 22056 flow [2024-11-07 19:40:42,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 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 19:40:42,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:42,186 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:42,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 19:40:42,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:42,387 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:42,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1317413601, now seen corresponding path program 7 times [2024-11-07 19:40:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:42,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417979679] [2024-11-07 19:40:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:42,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:42,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:42,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417979679] [2024-11-07 19:40:42,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417979679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127950808] [2024-11-07 19:40:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-07 19:40:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:42,519 INFO L229 MonitoredProcess]: Starting monitored process 18 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 19:40:42,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 19:40:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:42,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:42,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:42,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127950808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:42,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:42,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-07 19:40:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831094284] [2024-11-07 19:40:42,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:42,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:40:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:40:42,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:40:42,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:42,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1182 transitions, 22056 flow. Second operand has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 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 19:40:42,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:42,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:42,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:47,592 INFO L124 PetriNetUnfolderBase]: 6987/12423 cut-off events. [2024-11-07 19:40:47,592 INFO L125 PetriNetUnfolderBase]: For 181606/181606 co-relation queries the response was YES. [2024-11-07 19:40:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91635 conditions, 12423 events. 6987/12423 cut-off events. For 181606/181606 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 89316 event pairs, 1676 based on Foata normal form. 30/12453 useless extension candidates. Maximal degree in co-relation 90754. Up to 5808 conditions per place. [2024-11-07 19:40:47,719 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 541 selfloop transitions, 1087 changer transitions 5/1634 dead transitions. [2024-11-07 19:40:47,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1634 transitions, 32495 flow [2024-11-07 19:40:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-07 19:40:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-07 19:40:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 818 transitions. [2024-11-07 19:40:47,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243589743589744 [2024-11-07 19:40:47,721 INFO L175 Difference]: Start difference. First operand has 338 places, 1182 transitions, 22056 flow. Second operand 39 states and 818 transitions. [2024-11-07 19:40:47,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1634 transitions, 32495 flow [2024-11-07 19:40:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1634 transitions, 32116 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-11-07 19:40:49,923 INFO L231 Difference]: Finished difference. Result has 391 places, 1484 transitions, 31797 flow [2024-11-07 19:40:49,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21753, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=31797, PETRI_PLACES=391, PETRI_TRANSITIONS=1484} [2024-11-07 19:40:49,925 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 351 predicate places. [2024-11-07 19:40:49,925 INFO L471 AbstractCegarLoop]: Abstraction has has 391 places, 1484 transitions, 31797 flow [2024-11-07 19:40:49,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 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 19:40:49,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:49,925 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:50,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 19:40:50,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:50,126 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:40:50,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 578641119, now seen corresponding path program 8 times [2024-11-07 19:40:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836577994] [2024-11-07 19:40:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836577994] [2024-11-07 19:40:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836577994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416063143] [2024-11-07 19:40:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:50,274 INFO L229 MonitoredProcess]: Starting monitored process 19 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 19:40:50,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 19:40:50,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:40:50,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:50,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:40:50,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:50,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:40:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416063143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:50,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:50,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-07 19:40:50,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219999647] [2024-11-07 19:40:50,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:50,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:40:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:40:50,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:40:50,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:40:50,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1484 transitions, 31797 flow. Second operand has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 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 19:40:50,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:50,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:40:50,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:56,765 INFO L124 PetriNetUnfolderBase]: 7361/13120 cut-off events. [2024-11-07 19:40:56,765 INFO L125 PetriNetUnfolderBase]: For 245315/245315 co-relation queries the response was YES. [2024-11-07 19:40:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106860 conditions, 13120 events. 7361/13120 cut-off events. For 245315/245315 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 95745 event pairs, 1630 based on Foata normal form. 138/13258 useless extension candidates. Maximal degree in co-relation 106291. Up to 5620 conditions per place. [2024-11-07 19:40:56,987 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 777 selfloop transitions, 1052 changer transitions 2/1832 dead transitions. [2024-11-07 19:40:56,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1832 transitions, 41155 flow [2024-11-07 19:40:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-07 19:40:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-07 19:40:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 815 transitions. [2024-11-07 19:40:56,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5506756756756757 [2024-11-07 19:40:56,989 INFO L175 Difference]: Start difference. First operand has 391 places, 1484 transitions, 31797 flow. Second operand 37 states and 815 transitions. [2024-11-07 19:40:56,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1832 transitions, 41155 flow [2024-11-07 19:41:00,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1832 transitions, 40323 flow, removed 244 selfloop flow, removed 4 redundant places. [2024-11-07 19:41:00,673 INFO L231 Difference]: Finished difference. Result has 440 places, 1637 transitions, 38541 flow [2024-11-07 19:41:00,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=30915, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=38541, PETRI_PLACES=440, PETRI_TRANSITIONS=1637} [2024-11-07 19:41:00,674 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 400 predicate places. [2024-11-07 19:41:00,674 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1637 transitions, 38541 flow [2024-11-07 19:41:00,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 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 19:41:00,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:41:00,675 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:41:00,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-07 19:41:00,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-07 19:41:00,875 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:41:00,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:41:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 756282119, now seen corresponding path program 9 times [2024-11-07 19:41:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:41:00,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065292073] [2024-11-07 19:41:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:41:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:41:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:41:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:41:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065292073] [2024-11-07 19:41:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065292073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:41:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078906218] [2024-11-07 19:41:01,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:41:01,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:41:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:41:01,024 INFO L229 MonitoredProcess]: Starting monitored process 20 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 19:41:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-07 19:41:01,203 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:41:01,204 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:41:01,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:41:01,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:41:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:01,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:41:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078906218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:41:01,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:41:01,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-07 19:41:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171376462] [2024-11-07 19:41:01,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:41:01,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:41:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:41:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:41:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:41:01,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:41:01,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1637 transitions, 38541 flow. Second operand has 19 states, 19 states have (on average 15.947368421052632) internal successors, (303), 19 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 19:41:01,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:41:01,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:41:01,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:41:08,680 INFO L124 PetriNetUnfolderBase]: 8069/14209 cut-off events. [2024-11-07 19:41:08,681 INFO L125 PetriNetUnfolderBase]: For 317413/317413 co-relation queries the response was YES. [2024-11-07 19:41:08,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125962 conditions, 14209 events. 8069/14209 cut-off events. For 317413/317413 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 102861 event pairs, 480 based on Foata normal form. 160/14369 useless extension candidates. Maximal degree in co-relation 125580. Up to 2554 conditions per place. [2024-11-07 19:41:08,869 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 568 selfloop transitions, 1420 changer transitions 3/1992 dead transitions. [2024-11-07 19:41:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1992 transitions, 48308 flow [2024-11-07 19:41:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-07 19:41:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-07 19:41:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 866 transitions. [2024-11-07 19:41:08,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54125 [2024-11-07 19:41:08,871 INFO L175 Difference]: Start difference. First operand has 440 places, 1637 transitions, 38541 flow. Second operand 40 states and 866 transitions. [2024-11-07 19:41:08,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1992 transitions, 48308 flow [2024-11-07 19:41:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1992 transitions, 47638 flow, removed 221 selfloop flow, removed 7 redundant places. [2024-11-07 19:41:13,688 INFO L231 Difference]: Finished difference. Result has 481 places, 1815 transitions, 46539 flow [2024-11-07 19:41:13,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=36517, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=46539, PETRI_PLACES=481, PETRI_TRANSITIONS=1815} [2024-11-07 19:41:13,690 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 441 predicate places. [2024-11-07 19:41:13,690 INFO L471 AbstractCegarLoop]: Abstraction has has 481 places, 1815 transitions, 46539 flow [2024-11-07 19:41:13,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.947368421052632) internal successors, (303), 19 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 19:41:13,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:41:13,691 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:41:13,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-07 19:41:13,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:41:13,891 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-07 19:41:13,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:41:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1410661485, now seen corresponding path program 10 times [2024-11-07 19:41:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:41:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736548465] [2024-11-07 19:41:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:41:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:41:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:41:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:14,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:41:14,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736548465] [2024-11-07 19:41:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736548465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:41:14,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579597944] [2024-11-07 19:41:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:41:14,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:41:14,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:41:14,039 INFO L229 MonitoredProcess]: Starting monitored process 21 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 19:41:14,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-07 19:41:14,211 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:41:14,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:41:14,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:41:14,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:41:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:14,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:41:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:41:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579597944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:41:14,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:41:14,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-07 19:41:14,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948814261] [2024-11-07 19:41:14,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:41:14,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:41:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:41:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:41:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:41:14,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-07 19:41:14,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1815 transitions, 46539 flow. Second operand has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 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 19:41:14,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:41:14,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-07 19:41:14,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:41:22,920 INFO L124 PetriNetUnfolderBase]: 8292/14578 cut-off events. [2024-11-07 19:41:22,920 INFO L125 PetriNetUnfolderBase]: For 379719/379719 co-relation queries the response was YES. [2024-11-07 19:41:23,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139907 conditions, 14578 events. 8292/14578 cut-off events. For 379719/379719 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 106074 event pairs, 1902 based on Foata normal form. 9/14587 useless extension candidates. Maximal degree in co-relation 139354. Up to 6556 conditions per place. [2024-11-07 19:41:23,114 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 581 selfloop transitions, 1440 changer transitions 5/2027 dead transitions. [2024-11-07 19:41:23,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 2027 transitions, 54071 flow [2024-11-07 19:41:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-07 19:41:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-07 19:41:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 744 transitions. [2024-11-07 19:41:23,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-11-07 19:41:23,115 INFO L175 Difference]: Start difference. First operand has 481 places, 1815 transitions, 46539 flow. Second operand 35 states and 744 transitions. [2024-11-07 19:41:23,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 2027 transitions, 54071 flow