./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G valid-free) )\nCHECK( init(main()), LTL(G valid-deref) )\nCHECK( init(main()), LTL(G valid-memtrack) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', 'faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4'] 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/parallel-misc-1.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:31:47,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:31:47,100 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:31:47,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:31:47,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:31:47,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:31:47,129 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:31:47,130 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:31:47,130 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:31:47,130 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:31:47,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:31:47,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:31:47,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:31:47,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:31:47,130 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:31:47,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:31:47,131 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:31:47,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:31:47,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:31:47,132 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:31:47,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:31:47,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:31:47,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:31:47,133 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 -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-11-07 19:31:47,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:31:47,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:31:47,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:31:47,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:31:47,430 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:31:47,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-07 19:31:48,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:31:49,073 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:31:49,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-07 19:31:49,086 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d3b7b8c99/8a313c8b7f7a469d98dc6cc1abf8ee2e/FLAG2c948041c [2024-11-07 19:31:49,389 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d3b7b8c99/8a313c8b7f7a469d98dc6cc1abf8ee2e [2024-11-07 19:31:49,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:31:49,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:31:49,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:31:49,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:31:49,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:31:49,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b814e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49, skipping insertion in model container [2024-11-07 19:31:49,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,410 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:31:49,533 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 19:31:49,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:31:49,544 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:31:49,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:31:49,581 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:31:49,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49 WrapperNode [2024-11-07 19:31:49,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:31:49,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:31:49,583 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:31:49,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:31:49,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,593 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,617 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 279 [2024-11-07 19:31:49,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:31:49,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:31:49,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:31:49,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:31:49,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,648 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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 19:31:49,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,649 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,670 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:31:49,671 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:31:49,671 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:31:49,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:31:49,676 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (1/1) ... [2024-11-07 19:31:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:31:49,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:49,704 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 19:31:49,706 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 19:31:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:31:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:31:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:31:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:31:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:31:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:31:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:31:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:31:49,727 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 19:31:49,810 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:31:49,811 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:31:50,269 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:31:50,269 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:31:50,714 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:31:50,714 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-07 19:31:50,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:31:50 BoogieIcfgContainer [2024-11-07 19:31:50,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:31:50,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:31:50,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:31:50,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:31:50,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:31:49" (1/3) ... [2024-11-07 19:31:50,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c73788f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:31:50, skipping insertion in model container [2024-11-07 19:31:50,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:31:49" (2/3) ... [2024-11-07 19:31:50,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c73788f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:31:50, skipping insertion in model container [2024-11-07 19:31:50,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:31:50" (3/3) ... [2024-11-07 19:31:50,723 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-11-07 19:31:50,736 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:31:50,736 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-07 19:31:50,736 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:31:50,798 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:31:50,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2024-11-07 19:31:50,865 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2024-11-07 19:31:50,867 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:31:50,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 114 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-07 19:31:50,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2024-11-07 19:31:50,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 104 flow [2024-11-07 19:31:50,885 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:31:50,899 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;@3c599ced, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:31:50,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-07 19:31:50,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:31:50,904 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:31:50,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:31:50,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:50,906 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:31:50,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:50,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:50,910 INFO L85 PathProgramCache]: Analyzing trace with hash 977384, now seen corresponding path program 1 times [2024-11-07 19:31:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595262067] [2024-11-07 19:31:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:51,162 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 19:31:51,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595262067] [2024-11-07 19:31:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595262067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:51,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:31:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109695922] [2024-11-07 19:31:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:51,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:31:51,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:31:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:31:51,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:51,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:51,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:51,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:51,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:51,430 INFO L124 PetriNetUnfolderBase]: 220/507 cut-off events. [2024-11-07 19:31:51,430 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-07 19:31:51,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 507 events. 220/507 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2746 event pairs, 130 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 806. Up to 338 conditions per place. [2024-11-07 19:31:51,437 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 23 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-07 19:31:51,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 148 flow [2024-11-07 19:31:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:31:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:31:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-07 19:31:51,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-11-07 19:31:51,455 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-11-07 19:31:51,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 148 flow [2024-11-07 19:31:51,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:31:51,466 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 94 flow [2024-11-07 19:31:51,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2024-11-07 19:31:51,473 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2024-11-07 19:31:51,474 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 94 flow [2024-11-07 19:31:51,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:51,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:51,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:31:51,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:31:51,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:51,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 977385, now seen corresponding path program 1 times [2024-11-07 19:31:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917231428] [2024-11-07 19:31:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:51,827 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 19:31:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917231428] [2024-11-07 19:31:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917231428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:51,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:51,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:31:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122258291] [2024-11-07 19:31:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:51,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:51,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:51,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:51,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:51,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:51,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:52,064 INFO L124 PetriNetUnfolderBase]: 221/510 cut-off events. [2024-11-07 19:31:52,065 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:31:52,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 510 events. 221/510 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2770 event pairs, 130 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 846. Up to 343 conditions per place. [2024-11-07 19:31:52,069 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 25 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-07 19:31:52,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 160 flow [2024-11-07 19:31:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-07 19:31:52,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-11-07 19:31:52,071 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 94 flow. Second operand 4 states and 114 transitions. [2024-11-07 19:31:52,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 160 flow [2024-11-07 19:31:52,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:52,074 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2024-11-07 19:31:52,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-07 19:31:52,075 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2024-11-07 19:31:52,075 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2024-11-07 19:31:52,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:52,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:52,076 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:31:52,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:31:52,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:52,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:52,078 INFO L85 PathProgramCache]: Analyzing trace with hash 939297785, now seen corresponding path program 1 times [2024-11-07 19:31:52,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:52,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083541946] [2024-11-07 19:31:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:52,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:52,444 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 19:31:52,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083541946] [2024-11-07 19:31:52,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083541946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736122036] [2024-11-07 19:31:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:52,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:52,449 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 19:31:52,450 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 19:31:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:52,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:31:52,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:52,585 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 19:31:52,790 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 19:31:52,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:52,901 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 19:31:52,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736122036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:52,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:52,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:31:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147965348] [2024-11-07 19:31:52,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:52,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:31:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:31:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:31:53,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:53,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:53,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:53,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:53,449 INFO L124 PetriNetUnfolderBase]: 222/512 cut-off events. [2024-11-07 19:31:53,450 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:31:53,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 512 events. 222/512 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2772 event pairs, 130 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 853. Up to 340 conditions per place. [2024-11-07 19:31:53,456 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 21 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-11-07 19:31:53,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 187 flow [2024-11-07 19:31:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:31:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:31:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-11-07 19:31:53,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5127551020408163 [2024-11-07 19:31:53,458 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 8 states and 201 transitions. [2024-11-07 19:31:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 187 flow [2024-11-07 19:31:53,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:31:53,463 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 142 flow [2024-11-07 19:31:53,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-07 19:31:53,463 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-11-07 19:31:53,464 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 142 flow [2024-11-07 19:31:53,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:53,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:53,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:31:53,481 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 19:31:53,664 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 19:31:53,665 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:53,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -943354579, now seen corresponding path program 1 times [2024-11-07 19:31:53,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:53,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142631478] [2024-11-07 19:31:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:53,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:53,754 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 19:31:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142631478] [2024-11-07 19:31:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142631478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416763095] [2024-11-07 19:31:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:53,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:53,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:53,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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 19:31:53,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:53,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:53,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:53,912 INFO L124 PetriNetUnfolderBase]: 274/604 cut-off events. [2024-11-07 19:31:53,912 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:31:53,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 604 events. 274/604 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3165 event pairs, 157 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 827. Up to 316 conditions per place. [2024-11-07 19:31:53,916 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 40 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-07 19:31:53,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 256 flow [2024-11-07 19:31:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-11-07 19:31:53,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-07 19:31:53,918 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 142 flow. Second operand 4 states and 126 transitions. [2024-11-07 19:31:53,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 256 flow [2024-11-07 19:31:53,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 214 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-07 19:31:53,920 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 119 flow [2024-11-07 19:31:53,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-07 19:31:53,921 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2024-11-07 19:31:53,921 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 119 flow [2024-11-07 19:31:53,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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 19:31:53,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:53,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:53,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:31:53,922 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:53,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:53,922 INFO L85 PathProgramCache]: Analyzing trace with hash 912519453, now seen corresponding path program 1 times [2024-11-07 19:31:53,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:53,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278085593] [2024-11-07 19:31:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:53,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:53,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278085593] [2024-11-07 19:31:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278085593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:53,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:53,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:53,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035089687] [2024-11-07 19:31:53,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:54,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:54,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-11-07 19:31:54,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:54,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:54,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-11-07 19:31:54,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:54,129 INFO L124 PetriNetUnfolderBase]: 246/497 cut-off events. [2024-11-07 19:31:54,129 INFO L125 PetriNetUnfolderBase]: For 84/99 co-relation queries the response was YES. [2024-11-07 19:31:54,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 497 events. 246/497 cut-off events. For 84/99 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2266 event pairs, 135 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 648. Up to 379 conditions per place. [2024-11-07 19:31:54,132 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-07 19:31:54,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 171 flow [2024-11-07 19:31:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-07 19:31:54,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-07 19:31:54,134 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 119 flow. Second operand 4 states and 91 transitions. [2024-11-07 19:31:54,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 171 flow [2024-11-07 19:31:54,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:31:54,136 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 112 flow [2024-11-07 19:31:54,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-07 19:31:54,137 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2024-11-07 19:31:54,137 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 112 flow [2024-11-07 19:31:54,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:54,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:54,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:54,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:31:54,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:54,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:54,138 INFO L85 PathProgramCache]: Analyzing trace with hash 912519454, now seen corresponding path program 1 times [2024-11-07 19:31:54,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:54,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042305785] [2024-11-07 19:31:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:54,335 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 19:31:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:54,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042305785] [2024-11-07 19:31:54,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042305785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:54,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186153158] [2024-11-07 19:31:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:54,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:54,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:54,339 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 19:31:54,340 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 19:31:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:54,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 19:31:54,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:54,496 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 19:31:54,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:54,574 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 22 treesize of output 18 [2024-11-07 19:31:54,584 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 19:31:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186153158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:54,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:54,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-07 19:31:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87233431] [2024-11-07 19:31:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:54,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:31:54,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-11-07 19:31:54,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 112 flow. Second operand has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:54,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:54,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-11-07 19:31:54,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:55,060 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2024-11-07 19:31:55,062 INFO L125 PetriNetUnfolderBase]: For 111/137 co-relation queries the response was YES. [2024-11-07 19:31:55,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 762 events. 410/762 cut-off events. For 111/137 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3609 event pairs, 167 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 1282. Up to 266 conditions per place. [2024-11-07 19:31:55,067 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 56 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-11-07 19:31:55,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 307 flow [2024-11-07 19:31:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:31:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:31:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-11-07 19:31:55,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-11-07 19:31:55,071 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 112 flow. Second operand 6 states and 179 transitions. [2024-11-07 19:31:55,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 307 flow [2024-11-07 19:31:55,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:55,075 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 135 flow [2024-11-07 19:31:55,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-07 19:31:55,075 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-11-07 19:31:55,075 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 135 flow [2024-11-07 19:31:55,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:55,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:55,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:55,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:31:55,276 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 19:31:55,277 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:55,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash -325638019, now seen corresponding path program 1 times [2024-11-07 19:31:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210946688] [2024-11-07 19:31:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:55,344 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 19:31:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210946688] [2024-11-07 19:31:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210946688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:55,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561341809] [2024-11-07 19:31:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:55,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:55,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:55,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:55,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:55,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:55,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:55,524 INFO L124 PetriNetUnfolderBase]: 418/751 cut-off events. [2024-11-07 19:31:55,524 INFO L125 PetriNetUnfolderBase]: For 221/246 co-relation queries the response was YES. [2024-11-07 19:31:55,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 751 events. 418/751 cut-off events. For 221/246 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3374 event pairs, 250 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 1556. Up to 553 conditions per place. [2024-11-07 19:31:55,530 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-07 19:31:55,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 284 flow [2024-11-07 19:31:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-07 19:31:55,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-11-07 19:31:55,532 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 135 flow. Second operand 4 states and 127 transitions. [2024-11-07 19:31:55,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 284 flow [2024-11-07 19:31:55,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:55,534 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 148 flow [2024-11-07 19:31:55,534 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-07 19:31:55,535 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-11-07 19:31:55,535 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 148 flow [2024-11-07 19:31:55,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:55,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:55,536 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:55,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:31:55,536 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:55,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash 757878893, now seen corresponding path program 1 times [2024-11-07 19:31:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181361833] [2024-11-07 19:31:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:55,695 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 19:31:55,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:55,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181361833] [2024-11-07 19:31:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181361833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464995448] [2024-11-07 19:31:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:55,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:55,701 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 19:31:55,702 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 19:31:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:55,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 19:31:55,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:55,861 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 19:31:55,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:55,947 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 22 treesize of output 18 [2024-11-07 19:31:55,958 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 19:31:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464995448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:55,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-07 19:31:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097977334] [2024-11-07 19:31:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:55,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:55,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:31:56,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-11-07 19:31:56,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 21.333333333333332) internal successors, (192), 9 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:56,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:56,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-11-07 19:31:56,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:56,472 INFO L124 PetriNetUnfolderBase]: 638/1070 cut-off events. [2024-11-07 19:31:56,472 INFO L125 PetriNetUnfolderBase]: For 526/592 co-relation queries the response was YES. [2024-11-07 19:31:56,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1070 events. 638/1070 cut-off events. For 526/592 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4801 event pairs, 247 based on Foata normal form. 0/918 useless extension candidates. Maximal degree in co-relation 2454. Up to 467 conditions per place. [2024-11-07 19:31:56,482 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 62 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-07 19:31:56,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 393 flow [2024-11-07 19:31:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:31:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:31:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-11-07 19:31:56,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-11-07 19:31:56,484 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 148 flow. Second operand 6 states and 178 transitions. [2024-11-07 19:31:56,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 393 flow [2024-11-07 19:31:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:31:56,489 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 173 flow [2024-11-07 19:31:56,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-11-07 19:31:56,491 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 7 predicate places. [2024-11-07 19:31:56,492 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 173 flow [2024-11-07 19:31:56,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.333333333333332) internal successors, (192), 9 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:56,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:56,493 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:56,509 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 19:31:56,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:56,694 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:56,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash -80299091, now seen corresponding path program 1 times [2024-11-07 19:31:56,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:56,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771608112] [2024-11-07 19:31:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771608112] [2024-11-07 19:31:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771608112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423325106] [2024-11-07 19:31:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:56,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:56,832 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 19:31:56,837 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 19:31:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:56,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:31:56,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:57,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:57,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423325106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:57,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:57,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-07 19:31:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282411852] [2024-11-07 19:31:57,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:57,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:31:57,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:31:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:31:57,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:31:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:57,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:31:57,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:57,694 INFO L124 PetriNetUnfolderBase]: 1085/1894 cut-off events. [2024-11-07 19:31:57,694 INFO L125 PetriNetUnfolderBase]: For 1090/1132 co-relation queries the response was YES. [2024-11-07 19:31:57,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 1894 events. 1085/1894 cut-off events. For 1090/1132 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9890 event pairs, 646 based on Foata normal form. 26/1735 useless extension candidates. Maximal degree in co-relation 3928. Up to 873 conditions per place. [2024-11-07 19:31:57,706 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 93 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-07 19:31:57,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 599 flow [2024-11-07 19:31:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-11-07 19:31:57,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-07 19:31:57,709 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 173 flow. Second operand 9 states and 280 transitions. [2024-11-07 19:31:57,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 599 flow [2024-11-07 19:31:57,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 593 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:57,715 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 215 flow [2024-11-07 19:31:57,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-11-07 19:31:57,716 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2024-11-07 19:31:57,716 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 215 flow [2024-11-07 19:31:57,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:57,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:57,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:57,734 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 19:31:57,920 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,SelfDestructingSolverStorable8 [2024-11-07 19:31:57,920 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:57,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1249149805, now seen corresponding path program 1 times [2024-11-07 19:31:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576618177] [2024-11-07 19:31:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:58,009 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 19:31:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:58,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576618177] [2024-11-07 19:31:58,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576618177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:58,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:58,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:31:58,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722888127] [2024-11-07 19:31:58,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:58,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:31:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:31:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:31:58,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-07 19:31:58,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:58,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:58,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-07 19:31:58,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:58,332 INFO L124 PetriNetUnfolderBase]: 1410/2415 cut-off events. [2024-11-07 19:31:58,332 INFO L125 PetriNetUnfolderBase]: For 2167/2316 co-relation queries the response was YES. [2024-11-07 19:31:58,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 2415 events. 1410/2415 cut-off events. For 2167/2316 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13228 event pairs, 169 based on Foata normal form. 3/2158 useless extension candidates. Maximal degree in co-relation 5474. Up to 1227 conditions per place. [2024-11-07 19:31:58,347 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 76 selfloop transitions, 17 changer transitions 4/104 dead transitions. [2024-11-07 19:31:58,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 642 flow [2024-11-07 19:31:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:31:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:31:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-07 19:31:58,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746938775510204 [2024-11-07 19:31:58,348 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 215 flow. Second operand 5 states and 183 transitions. [2024-11-07 19:31:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 642 flow [2024-11-07 19:31:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 634 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:31:58,359 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 337 flow [2024-11-07 19:31:58,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-07 19:31:58,361 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2024-11-07 19:31:58,361 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 337 flow [2024-11-07 19:31:58,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:58,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:58,361 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:58,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:31:58,362 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:31:58,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -162723395, now seen corresponding path program 2 times [2024-11-07 19:31:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386565650] [2024-11-07 19:31:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:58,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386565650] [2024-11-07 19:31:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386565650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568023635] [2024-11-07 19:31:58,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:31:58,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:58,592 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 19:31:58,594 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 19:31:58,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:31:58,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:58,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:58,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:31:58,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:59,008 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 21 treesize of output 17 [2024-11-07 19:31:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:31:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568023635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:59,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:59,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2024-11-07 19:31:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576024927] [2024-11-07 19:31:59,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:59,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:31:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:31:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:31:59,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-07 19:31:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 337 flow. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-07 19:31:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:00,792 INFO L124 PetriNetUnfolderBase]: 1725/2847 cut-off events. [2024-11-07 19:32:00,793 INFO L125 PetriNetUnfolderBase]: For 4559/4656 co-relation queries the response was YES. [2024-11-07 19:32:00,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9716 conditions, 2847 events. 1725/2847 cut-off events. For 4559/4656 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15204 event pairs, 491 based on Foata normal form. 48/2885 useless extension candidates. Maximal degree in co-relation 8137. Up to 869 conditions per place. [2024-11-07 19:32:00,812 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 153 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2024-11-07 19:32:00,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 171 transitions, 1228 flow [2024-11-07 19:32:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 19:32:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-07 19:32:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-11-07 19:32:00,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-07 19:32:00,816 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 337 flow. Second operand 11 states and 308 transitions. [2024-11-07 19:32:00,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 171 transitions, 1228 flow [2024-11-07 19:32:00,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 171 transitions, 1131 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-07 19:32:00,830 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 347 flow [2024-11-07 19:32:00,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=347, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-11-07 19:32:00,831 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 23 predicate places. [2024-11-07 19:32:00,831 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 347 flow [2024-11-07 19:32:00,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 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 19:32:00,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:00,832 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:00,848 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 19:32:01,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-07 19:32:01,036 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:01,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1517652309, now seen corresponding path program 1 times [2024-11-07 19:32:01,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:01,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244953029] [2024-11-07 19:32:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:01,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:01,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244953029] [2024-11-07 19:32:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244953029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78493902] [2024-11-07 19:32:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:01,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:01,166 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 19:32:01,167 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 19:32:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:01,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-07 19:32:01,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:01,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78493902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:01,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-07 19:32:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640250728] [2024-11-07 19:32:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:01,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:32:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:32:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:32:01,567 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:01,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 347 flow. Second operand has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 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 19:32:01,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:01,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:01,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:02,070 INFO L124 PetriNetUnfolderBase]: 1454/2424 cut-off events. [2024-11-07 19:32:02,070 INFO L125 PetriNetUnfolderBase]: For 3293/3293 co-relation queries the response was YES. [2024-11-07 19:32:02,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 2424 events. 1454/2424 cut-off events. For 3293/3293 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12336 event pairs, 798 based on Foata normal form. 27/2449 useless extension candidates. Maximal degree in co-relation 6435. Up to 1621 conditions per place. [2024-11-07 19:32:02,089 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 114 selfloop transitions, 10 changer transitions 1/131 dead transitions. [2024-11-07 19:32:02,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 131 transitions, 962 flow [2024-11-07 19:32:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:32:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:32:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-11-07 19:32:02,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-07 19:32:02,091 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 347 flow. Second operand 9 states and 273 transitions. [2024-11-07 19:32:02,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 131 transitions, 962 flow [2024-11-07 19:32:02,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 918 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-07 19:32:02,098 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 380 flow [2024-11-07 19:32:02,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=380, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-11-07 19:32:02,099 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 26 predicate places. [2024-11-07 19:32:02,099 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 380 flow [2024-11-07 19:32:02,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 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 19:32:02,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:02,100 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:02,116 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 19:32:02,303 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,SelfDestructingSolverStorable11 [2024-11-07 19:32:02,304 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:02,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash 876970171, now seen corresponding path program 2 times [2024-11-07 19:32:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295121036] [2024-11-07 19:32:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295121036] [2024-11-07 19:32:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295121036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876607681] [2024-11-07 19:32:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:02,527 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 19:32:02,529 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 19:32:02,609 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:32:02,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:02,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:32:02,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:02,630 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 19:32:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:32:02,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:32:03,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876607681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:03,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:03,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-07 19:32:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255714812] [2024-11-07 19:32:03,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:03,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:32:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:32:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:32:03,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-07 19:32:03,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 380 flow. Second operand has 17 states, 17 states have (on average 20.58823529411765) internal successors, (350), 17 states have internal predecessors, (350), 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 19:32:03,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:03,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-07 19:32:03,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:04,429 INFO L124 PetriNetUnfolderBase]: 2022/3259 cut-off events. [2024-11-07 19:32:04,429 INFO L125 PetriNetUnfolderBase]: For 4086/4086 co-relation queries the response was YES. [2024-11-07 19:32:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 3259 events. 2022/3259 cut-off events. For 4086/4086 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 16278 event pairs, 414 based on Foata normal form. 102/3359 useless extension candidates. Maximal degree in co-relation 10247. Up to 818 conditions per place. [2024-11-07 19:32:04,448 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 167 selfloop transitions, 12 changer transitions 0/184 dead transitions. [2024-11-07 19:32:04,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 184 transitions, 1396 flow [2024-11-07 19:32:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:32:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:32:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 336 transitions. [2024-11-07 19:32:04,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-07 19:32:04,450 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 380 flow. Second operand 12 states and 336 transitions. [2024-11-07 19:32:04,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 184 transitions, 1396 flow [2024-11-07 19:32:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 184 transitions, 1385 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:32:04,458 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 408 flow [2024-11-07 19:32:04,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=408, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2024-11-07 19:32:04,459 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2024-11-07 19:32:04,459 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 408 flow [2024-11-07 19:32:04,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.58823529411765) internal successors, (350), 17 states have internal predecessors, (350), 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 19:32:04,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:04,459 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 19:32:04,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:32:04,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:04,659 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:04,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1973268354, now seen corresponding path program 1 times [2024-11-07 19:32:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:04,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651684778] [2024-11-07 19:32:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:04,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:04,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651684778] [2024-11-07 19:32:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651684778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:04,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862848025] [2024-11-07 19:32:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:04,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:04,751 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 19:32:04,753 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 19:32:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:04,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:32:04,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:04,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862848025] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:04,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:32:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-07 19:32:04,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715812054] [2024-11-07 19:32:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:32:04,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:32:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:32:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:32:04,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:04,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 408 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:32:04,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:04,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:05,211 INFO L124 PetriNetUnfolderBase]: 1929/3110 cut-off events. [2024-11-07 19:32:05,211 INFO L125 PetriNetUnfolderBase]: For 4573/4573 co-relation queries the response was YES. [2024-11-07 19:32:05,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11037 conditions, 3110 events. 1929/3110 cut-off events. For 4573/4573 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 15260 event pairs, 1015 based on Foata normal form. 57/3161 useless extension candidates. Maximal degree in co-relation 9969. Up to 2371 conditions per place. [2024-11-07 19:32:05,223 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-07 19:32:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 87 transitions, 697 flow [2024-11-07 19:32:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:32:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:32:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-07 19:32:05,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-11-07 19:32:05,225 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 408 flow. Second operand 5 states and 143 transitions. [2024-11-07 19:32:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 87 transitions, 697 flow [2024-11-07 19:32:05,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 671 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-07 19:32:05,233 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 404 flow [2024-11-07 19:32:05,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2024-11-07 19:32:05,235 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 29 predicate places. [2024-11-07 19:32:05,235 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 404 flow [2024-11-07 19:32:05,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:32:05,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:05,236 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 19:32:05,254 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 19:32:05,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:05,440 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:05,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1230144895, now seen corresponding path program 1 times [2024-11-07 19:32:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432334116] [2024-11-07 19:32:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:05,529 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 19:32:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432334116] [2024-11-07 19:32:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432334116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288232765] [2024-11-07 19:32:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:05,532 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 19:32:05,534 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 19:32:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:05,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:32:05,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:05,643 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 19:32:05,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:05,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288232765] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:05,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:32:05,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-07 19:32:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560794226] [2024-11-07 19:32:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:32:05,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:32:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:32:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:32:05,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:32:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:05,901 INFO L124 PetriNetUnfolderBase]: 1729/2789 cut-off events. [2024-11-07 19:32:05,901 INFO L125 PetriNetUnfolderBase]: For 3898/3898 co-relation queries the response was YES. [2024-11-07 19:32:05,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 2789 events. 1729/2789 cut-off events. For 3898/3898 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 13321 event pairs, 822 based on Foata normal form. 62/2839 useless extension candidates. Maximal degree in co-relation 9003. Up to 1947 conditions per place. [2024-11-07 19:32:05,914 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 68 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-11-07 19:32:05,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 645 flow [2024-11-07 19:32:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:32:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:32:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-07 19:32:05,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5877551020408164 [2024-11-07 19:32:05,916 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 404 flow. Second operand 5 states and 144 transitions. [2024-11-07 19:32:05,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 645 flow [2024-11-07 19:32:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 617 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:32:05,925 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 376 flow [2024-11-07 19:32:05,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-11-07 19:32:05,926 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2024-11-07 19:32:05,926 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 376 flow [2024-11-07 19:32:05,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:32:05,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:05,927 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:05,944 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 19:32:06,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:06,128 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:06,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1341747170, now seen corresponding path program 1 times [2024-11-07 19:32:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:06,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573144948] [2024-11-07 19:32:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573144948] [2024-11-07 19:32:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573144948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413960714] [2024-11-07 19:32:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:06,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:06,771 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 19:32:06,773 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 19:32:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:06,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:32:06,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:06,876 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 19:32:07,154 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 19:32:07,180 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 19:32:07,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413960714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:07,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 25 [2024-11-07 19:32:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032037032] [2024-11-07 19:32:07,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:07,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:32:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:32:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:32:08,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-07 19:32:08,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 376 flow. Second operand has 25 states, 25 states have (on average 24.28) internal successors, (607), 25 states have internal predecessors, (607), 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 19:32:08,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:08,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-07 19:32:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:09,346 INFO L124 PetriNetUnfolderBase]: 1982/3246 cut-off events. [2024-11-07 19:32:09,347 INFO L125 PetriNetUnfolderBase]: For 5322/5322 co-relation queries the response was YES. [2024-11-07 19:32:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 3246 events. 1982/3246 cut-off events. For 5322/5322 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16531 event pairs, 78 based on Foata normal form. 2/3236 useless extension candidates. Maximal degree in co-relation 10285. Up to 1508 conditions per place. [2024-11-07 19:32:09,363 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 119 selfloop transitions, 61 changer transitions 3/193 dead transitions. [2024-11-07 19:32:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 193 transitions, 1399 flow [2024-11-07 19:32:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:32:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:32:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 481 transitions. [2024-11-07 19:32:09,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.654421768707483 [2024-11-07 19:32:09,366 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 376 flow. Second operand 15 states and 481 transitions. [2024-11-07 19:32:09,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 193 transitions, 1399 flow [2024-11-07 19:32:09,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 193 transitions, 1376 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:32:09,378 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 942 flow [2024-11-07 19:32:09,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=942, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-11-07 19:32:09,378 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 47 predicate places. [2024-11-07 19:32:09,378 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 942 flow [2024-11-07 19:32:09,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 24.28) internal successors, (607), 25 states have internal predecessors, (607), 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 19:32:09,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:09,379 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:09,395 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 19:32:09,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:32:09,579 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:09,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -773351910, now seen corresponding path program 2 times [2024-11-07 19:32:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480412357] [2024-11-07 19:32:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:10,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480412357] [2024-11-07 19:32:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480412357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270124222] [2024-11-07 19:32:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:10,131 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 19:32:10,133 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 19:32:10,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:32:10,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:10,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-07 19:32:10,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:10,238 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 19:32:10,457 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 19:32:10,501 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 19:32:10,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270124222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:10,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:10,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 24 [2024-11-07 19:32:10,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755984760] [2024-11-07 19:32:10,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:10,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:32:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:32:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:32:11,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-07 19:32:11,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 942 flow. Second operand has 24 states, 24 states have (on average 24.25) internal successors, (582), 24 states have internal predecessors, (582), 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 19:32:11,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:11,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-07 19:32:11,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:12,113 INFO L124 PetriNetUnfolderBase]: 2834/4592 cut-off events. [2024-11-07 19:32:12,114 INFO L125 PetriNetUnfolderBase]: For 13530/13538 co-relation queries the response was YES. [2024-11-07 19:32:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20545 conditions, 4592 events. 2834/4592 cut-off events. For 13530/13538 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24711 event pairs, 308 based on Foata normal form. 2/4580 useless extension candidates. Maximal degree in co-relation 18496. Up to 2608 conditions per place. [2024-11-07 19:32:12,171 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 160 selfloop transitions, 100 changer transitions 5/275 dead transitions. [2024-11-07 19:32:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 275 transitions, 2789 flow [2024-11-07 19:32:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:32:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:32:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 475 transitions. [2024-11-07 19:32:12,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-11-07 19:32:12,173 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 942 flow. Second operand 15 states and 475 transitions. [2024-11-07 19:32:12,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 275 transitions, 2789 flow [2024-11-07 19:32:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 275 transitions, 2683 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-11-07 19:32:12,219 INFO L231 Difference]: Finished difference. Result has 111 places, 198 transitions, 2161 flow [2024-11-07 19:32:12,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2161, PETRI_PLACES=111, PETRI_TRANSITIONS=198} [2024-11-07 19:32:12,219 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 63 predicate places. [2024-11-07 19:32:12,219 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 198 transitions, 2161 flow [2024-11-07 19:32:12,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 24.25) internal successors, (582), 24 states have internal predecessors, (582), 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 19:32:12,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:12,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:12,232 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 19:32:12,420 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,SelfDestructingSolverStorable16 [2024-11-07 19:32:12,420 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:12,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1173742950, now seen corresponding path program 3 times [2024-11-07 19:32:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532988575] [2024-11-07 19:32:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:12,937 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 19:32:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532988575] [2024-11-07 19:32:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532988575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826810132] [2024-11-07 19:32:12,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:32:12,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:12,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:12,941 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 19:32:12,942 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 19:32:13,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:32:13,027 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:13,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-07 19:32:13,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:13,318 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 19:32:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:13,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:13,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:32:13,491 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 25 treesize of output 18 [2024-11-07 19:32:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826810132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:13,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:13,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 10] total 26 [2024-11-07 19:32:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746507462] [2024-11-07 19:32:13,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:13,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:32:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:32:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:32:14,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:14,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 198 transitions, 2161 flow. Second operand has 26 states, 26 states have (on average 23.23076923076923) internal successors, (604), 26 states have internal predecessors, (604), 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 19:32:14,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:14,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:14,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:15,388 INFO L124 PetriNetUnfolderBase]: 3998/6337 cut-off events. [2024-11-07 19:32:15,388 INFO L125 PetriNetUnfolderBase]: For 26325/26337 co-relation queries the response was YES. [2024-11-07 19:32:15,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31450 conditions, 6337 events. 3998/6337 cut-off events. For 26325/26337 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 34818 event pairs, 511 based on Foata normal form. 2/6307 useless extension candidates. Maximal degree in co-relation 28834. Up to 3374 conditions per place. [2024-11-07 19:32:15,419 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 168 selfloop transitions, 133 changer transitions 12/320 dead transitions. [2024-11-07 19:32:15,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 320 transitions, 3697 flow [2024-11-07 19:32:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:32:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:32:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 518 transitions. [2024-11-07 19:32:15,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2024-11-07 19:32:15,421 INFO L175 Difference]: Start difference. First operand has 111 places, 198 transitions, 2161 flow. Second operand 17 states and 518 transitions. [2024-11-07 19:32:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 320 transitions, 3697 flow [2024-11-07 19:32:15,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 320 transitions, 3600 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-11-07 19:32:15,527 INFO L231 Difference]: Finished difference. Result has 126 places, 223 transitions, 2776 flow [2024-11-07 19:32:15,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2776, PETRI_PLACES=126, PETRI_TRANSITIONS=223} [2024-11-07 19:32:15,527 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 78 predicate places. [2024-11-07 19:32:15,528 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 223 transitions, 2776 flow [2024-11-07 19:32:15,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.23076923076923) internal successors, (604), 26 states have internal predecessors, (604), 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 19:32:15,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:15,528 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:15,544 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 19:32:15,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:32:15,733 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:15,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash 44951254, now seen corresponding path program 1 times [2024-11-07 19:32:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:15,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912429384] [2024-11-07 19:32:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:16,199 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 19:32:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912429384] [2024-11-07 19:32:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912429384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140192175] [2024-11-07 19:32:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:16,201 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 19:32:16,202 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 19:32:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:16,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:32:16,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:16,296 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 19:32:16,497 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 19:32:16,517 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 19:32:16,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140192175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:16,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 24 [2024-11-07 19:32:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907373168] [2024-11-07 19:32:16,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:16,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:32:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:32:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:32:17,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:17,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 223 transitions, 2776 flow. Second operand has 24 states, 24 states have (on average 23.5) internal successors, (564), 24 states have internal predecessors, (564), 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 19:32:17,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:17,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:17,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:18,484 INFO L124 PetriNetUnfolderBase]: 4311/6802 cut-off events. [2024-11-07 19:32:18,484 INFO L125 PetriNetUnfolderBase]: For 37570/37576 co-relation queries the response was YES. [2024-11-07 19:32:18,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36282 conditions, 6802 events. 4311/6802 cut-off events. For 37570/37576 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 37499 event pairs, 477 based on Foata normal form. 2/6775 useless extension candidates. Maximal degree in co-relation 33688. Up to 3625 conditions per place. [2024-11-07 19:32:18,517 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 226 selfloop transitions, 119 changer transitions 17/369 dead transitions. [2024-11-07 19:32:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 369 transitions, 4539 flow [2024-11-07 19:32:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:32:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:32:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 540 transitions. [2024-11-07 19:32:18,519 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6482593037214885 [2024-11-07 19:32:18,519 INFO L175 Difference]: Start difference. First operand has 126 places, 223 transitions, 2776 flow. Second operand 17 states and 540 transitions. [2024-11-07 19:32:18,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 369 transitions, 4539 flow [2024-11-07 19:32:18,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 369 transitions, 4339 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-11-07 19:32:18,610 INFO L231 Difference]: Finished difference. Result has 136 places, 246 transitions, 3254 flow [2024-11-07 19:32:18,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3254, PETRI_PLACES=136, PETRI_TRANSITIONS=246} [2024-11-07 19:32:18,611 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 88 predicate places. [2024-11-07 19:32:18,611 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 246 transitions, 3254 flow [2024-11-07 19:32:18,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.5) internal successors, (564), 24 states have internal predecessors, (564), 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 19:32:18,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:18,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:18,623 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 19:32:18,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:18,812 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:18,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1078870358, now seen corresponding path program 2 times [2024-11-07 19:32:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896931905] [2024-11-07 19:32:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:19,384 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 19:32:19,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:19,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896931905] [2024-11-07 19:32:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896931905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:19,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111107674] [2024-11-07 19:32:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:19,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:19,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:19,387 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 19:32:19,390 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 19:32:19,467 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:32:19,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:19,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:32:19,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:19,685 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 19:32:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:19,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:19,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:32:19,812 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 25 treesize of output 18 [2024-11-07 19:32:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111107674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:19,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 10] total 24 [2024-11-07 19:32:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771880595] [2024-11-07 19:32:19,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:19,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:32:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:32:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:32:20,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 246 transitions, 3254 flow. Second operand has 24 states, 24 states have (on average 23.375) internal successors, (561), 24 states have internal predecessors, (561), 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 19:32:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:21,738 INFO L124 PetriNetUnfolderBase]: 4839/7639 cut-off events. [2024-11-07 19:32:21,738 INFO L125 PetriNetUnfolderBase]: For 55478/55490 co-relation queries the response was YES. [2024-11-07 19:32:21,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43660 conditions, 7639 events. 4839/7639 cut-off events. For 55478/55490 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 42880 event pairs, 798 based on Foata normal form. 2/7609 useless extension candidates. Maximal degree in co-relation 41317. Up to 4004 conditions per place. [2024-11-07 19:32:21,796 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 189 selfloop transitions, 121 changer transitions 22/339 dead transitions. [2024-11-07 19:32:21,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 339 transitions, 4665 flow [2024-11-07 19:32:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:32:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:32:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 435 transitions. [2024-11-07 19:32:21,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6341107871720116 [2024-11-07 19:32:21,798 INFO L175 Difference]: Start difference. First operand has 136 places, 246 transitions, 3254 flow. Second operand 14 states and 435 transitions. [2024-11-07 19:32:21,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 339 transitions, 4665 flow [2024-11-07 19:32:21,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 339 transitions, 4516 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-11-07 19:32:21,961 INFO L231 Difference]: Finished difference. Result has 143 places, 243 transitions, 3425 flow [2024-11-07 19:32:21,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3425, PETRI_PLACES=143, PETRI_TRANSITIONS=243} [2024-11-07 19:32:21,961 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 95 predicate places. [2024-11-07 19:32:21,962 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 243 transitions, 3425 flow [2024-11-07 19:32:21,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.375) internal successors, (561), 24 states have internal predecessors, (561), 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 19:32:21,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:21,962 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:21,974 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 19:32:22,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:22,163 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:22,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -206548654, now seen corresponding path program 4 times [2024-11-07 19:32:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:22,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656857202] [2024-11-07 19:32:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:22,777 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 19:32:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656857202] [2024-11-07 19:32:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656857202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997176105] [2024-11-07 19:32:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:32:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:22,780 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 19:32:22,782 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 19:32:22,865 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:32:22,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:22,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-07 19:32:22,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:22,889 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 19:32:23,126 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 19:32:23,153 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 19:32:23,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:23,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997176105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:23,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:23,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 26 [2024-11-07 19:32:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635093878] [2024-11-07 19:32:23,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:23,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:32:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:32:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:32:24,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:24,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 243 transitions, 3425 flow. Second operand has 26 states, 26 states have (on average 23.23076923076923) internal successors, (604), 26 states have internal predecessors, (604), 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 19:32:24,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:24,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:24,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:26,060 INFO L124 PetriNetUnfolderBase]: 5342/8390 cut-off events. [2024-11-07 19:32:26,060 INFO L125 PetriNetUnfolderBase]: For 67261/67267 co-relation queries the response was YES. [2024-11-07 19:32:26,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49490 conditions, 8390 events. 5342/8390 cut-off events. For 67261/67267 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47963 event pairs, 850 based on Foata normal form. 2/8363 useless extension candidates. Maximal degree in co-relation 47686. Up to 5355 conditions per place. [2024-11-07 19:32:26,124 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 273 selfloop transitions, 134 changer transitions 7/421 dead transitions. [2024-11-07 19:32:26,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 421 transitions, 5902 flow [2024-11-07 19:32:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-07 19:32:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-07 19:32:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 714 transitions. [2024-11-07 19:32:26,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-07 19:32:26,126 INFO L175 Difference]: Start difference. First operand has 143 places, 243 transitions, 3425 flow. Second operand 24 states and 714 transitions. [2024-11-07 19:32:26,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 421 transitions, 5902 flow [2024-11-07 19:32:26,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 421 transitions, 5720 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-11-07 19:32:26,265 INFO L231 Difference]: Finished difference. Result has 161 places, 298 transitions, 4625 flow [2024-11-07 19:32:26,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4625, PETRI_PLACES=161, PETRI_TRANSITIONS=298} [2024-11-07 19:32:26,265 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 113 predicate places. [2024-11-07 19:32:26,265 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 298 transitions, 4625 flow [2024-11-07 19:32:26,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.23076923076923) internal successors, (604), 26 states have internal predecessors, (604), 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 19:32:26,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:26,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:26,278 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 19:32:26,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:26,466 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:26,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 667192026, now seen corresponding path program 5 times [2024-11-07 19:32:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997606223] [2024-11-07 19:32:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:26,930 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 19:32:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997606223] [2024-11-07 19:32:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997606223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504006941] [2024-11-07 19:32:26,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:32:26,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:26,934 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 19:32:26,935 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 19:32:27,022 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 19:32:27,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:27,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:32:27,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:27,044 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 19:32:27,257 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 19:32:27,302 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 19:32:27,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504006941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:27,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2024-11-07 19:32:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695611975] [2024-11-07 19:32:27,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:27,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:32:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:32:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:32:28,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 298 transitions, 4625 flow. Second operand has 25 states, 25 states have (on average 23.28) internal successors, (582), 25 states have internal predecessors, (582), 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 19:32:28,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:28,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:28,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:30,065 INFO L124 PetriNetUnfolderBase]: 5797/9087 cut-off events. [2024-11-07 19:32:30,065 INFO L125 PetriNetUnfolderBase]: For 91199/91205 co-relation queries the response was YES. [2024-11-07 19:32:30,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 9087 events. 5797/9087 cut-off events. For 91199/91205 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 52719 event pairs, 1077 based on Foata normal form. 2/9058 useless extension candidates. Maximal degree in co-relation 55275. Up to 6116 conditions per place. [2024-11-07 19:32:30,167 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 279 selfloop transitions, 131 changer transitions 9/426 dead transitions. [2024-11-07 19:32:30,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 426 transitions, 6607 flow [2024-11-07 19:32:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:32:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:32:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 633 transitions. [2024-11-07 19:32:30,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6151603498542274 [2024-11-07 19:32:30,169 INFO L175 Difference]: Start difference. First operand has 161 places, 298 transitions, 4625 flow. Second operand 21 states and 633 transitions. [2024-11-07 19:32:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 426 transitions, 6607 flow [2024-11-07 19:32:30,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 426 transitions, 6297 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-11-07 19:32:30,445 INFO L231 Difference]: Finished difference. Result has 175 places, 318 transitions, 5146 flow [2024-11-07 19:32:30,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5146, PETRI_PLACES=175, PETRI_TRANSITIONS=318} [2024-11-07 19:32:30,446 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 127 predicate places. [2024-11-07 19:32:30,446 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 318 transitions, 5146 flow [2024-11-07 19:32:30,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 23.28) internal successors, (582), 25 states have internal predecessors, (582), 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 19:32:30,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:30,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:30,459 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 19:32:30,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:30,647 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:30,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 946272722, now seen corresponding path program 6 times [2024-11-07 19:32:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513664975] [2024-11-07 19:32:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:30,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:31,190 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 19:32:31,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513664975] [2024-11-07 19:32:31,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513664975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945006136] [2024-11-07 19:32:31,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:32:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:31,194 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 19:32:31,196 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 19:32:31,292 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-07 19:32:31,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:31,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-07 19:32:31,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:31,322 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 19:32:31,602 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 19:32:31,651 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 19:32:31,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945006136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:31,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:31,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2024-11-07 19:32:31,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576967561] [2024-11-07 19:32:31,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:31,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-07 19:32:31,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-07 19:32:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:32:32,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:32,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 318 transitions, 5146 flow. Second operand has 27 states, 27 states have (on average 23.14814814814815) internal successors, (625), 27 states have internal predecessors, (625), 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 19:32:32,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:32,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:32,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:34,137 INFO L124 PetriNetUnfolderBase]: 6171/9689 cut-off events. [2024-11-07 19:32:34,137 INFO L125 PetriNetUnfolderBase]: For 109478/109490 co-relation queries the response was YES. [2024-11-07 19:32:34,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62715 conditions, 9689 events. 6171/9689 cut-off events. For 109478/109490 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 57142 event pairs, 1062 based on Foata normal form. 2/9657 useless extension candidates. Maximal degree in co-relation 60916. Up to 6351 conditions per place. [2024-11-07 19:32:34,234 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 264 selfloop transitions, 150 changer transitions 17/438 dead transitions. [2024-11-07 19:32:34,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 438 transitions, 7260 flow [2024-11-07 19:32:34,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:32:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:32:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 515 transitions. [2024-11-07 19:32:34,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6182472989195679 [2024-11-07 19:32:34,235 INFO L175 Difference]: Start difference. First operand has 175 places, 318 transitions, 5146 flow. Second operand 17 states and 515 transitions. [2024-11-07 19:32:34,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 438 transitions, 7260 flow [2024-11-07 19:32:34,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 438 transitions, 6923 flow, removed 88 selfloop flow, removed 16 redundant places. [2024-11-07 19:32:34,626 INFO L231 Difference]: Finished difference. Result has 180 places, 338 transitions, 5768 flow [2024-11-07 19:32:34,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5768, PETRI_PLACES=180, PETRI_TRANSITIONS=338} [2024-11-07 19:32:34,626 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2024-11-07 19:32:34,626 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 338 transitions, 5768 flow [2024-11-07 19:32:34,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 23.14814814814815) internal successors, (625), 27 states have internal predecessors, (625), 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 19:32:34,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:34,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:34,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-07 19:32:34,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:34,827 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:34,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1072108338, now seen corresponding path program 1 times [2024-11-07 19:32:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114553625] [2024-11-07 19:32:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:35,308 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 19:32:35,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114553625] [2024-11-07 19:32:35,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114553625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400595879] [2024-11-07 19:32:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:35,310 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 19:32:35,311 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 19:32:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:35,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:32:35,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:35,412 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 19:32:35,635 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 19:32:35,661 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 19:32:35,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:35,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400595879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:35,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 23 [2024-11-07 19:32:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571731346] [2024-11-07 19:32:35,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:35,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:32:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:32:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:32:36,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:36,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 338 transitions, 5768 flow. Second operand has 23 states, 23 states have (on average 23.52173913043478) internal successors, (541), 23 states have internal predecessors, (541), 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 19:32:36,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:36,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:36,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:38,354 INFO L124 PetriNetUnfolderBase]: 6462/10176 cut-off events. [2024-11-07 19:32:38,354 INFO L125 PetriNetUnfolderBase]: For 127303/127309 co-relation queries the response was YES. [2024-11-07 19:32:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67121 conditions, 10176 events. 6462/10176 cut-off events. For 127303/127309 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 60684 event pairs, 1239 based on Foata normal form. 2/10149 useless extension candidates. Maximal degree in co-relation 65688. Up to 6441 conditions per place. [2024-11-07 19:32:38,461 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 294 selfloop transitions, 138 changer transitions 15/454 dead transitions. [2024-11-07 19:32:38,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 454 transitions, 7637 flow [2024-11-07 19:32:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:32:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:32:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 527 transitions. [2024-11-07 19:32:38,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-11-07 19:32:38,463 INFO L175 Difference]: Start difference. First operand has 180 places, 338 transitions, 5768 flow. Second operand 17 states and 527 transitions. [2024-11-07 19:32:38,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 454 transitions, 7637 flow [2024-11-07 19:32:38,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 454 transitions, 7457 flow, removed 45 selfloop flow, removed 12 redundant places. [2024-11-07 19:32:38,785 INFO L231 Difference]: Finished difference. Result has 187 places, 348 transitions, 6269 flow [2024-11-07 19:32:38,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6269, PETRI_PLACES=187, PETRI_TRANSITIONS=348} [2024-11-07 19:32:38,786 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 139 predicate places. [2024-11-07 19:32:38,786 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 348 transitions, 6269 flow [2024-11-07 19:32:38,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 23.52173913043478) internal successors, (541), 23 states have internal predecessors, (541), 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 19:32:38,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:38,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:38,799 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 19:32:38,986 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,SelfDestructingSolverStorable23 [2024-11-07 19:32:38,987 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:38,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1446334954, now seen corresponding path program 2 times [2024-11-07 19:32:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:38,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539049964] [2024-11-07 19:32:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:38,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:39,445 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 19:32:39,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539049964] [2024-11-07 19:32:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539049964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45164597] [2024-11-07 19:32:39,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:39,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:39,448 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 19:32:39,449 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 19:32:39,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:32:39,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:39,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-07 19:32:39,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:39,721 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 19:32:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:39,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:39,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:32:39,783 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 24 treesize of output 17 [2024-11-07 19:32:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45164597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:39,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 23 [2024-11-07 19:32:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624752661] [2024-11-07 19:32:39,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:39,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:32:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:32:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:32:40,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:40,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 348 transitions, 6269 flow. Second operand has 23 states, 23 states have (on average 23.52173913043478) internal successors, (541), 23 states have internal predecessors, (541), 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 19:32:40,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:40,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:40,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:42,082 INFO L124 PetriNetUnfolderBase]: 6898/10780 cut-off events. [2024-11-07 19:32:42,082 INFO L125 PetriNetUnfolderBase]: For 158942/158954 co-relation queries the response was YES. [2024-11-07 19:32:42,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74577 conditions, 10780 events. 6898/10780 cut-off events. For 158942/158954 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 64607 event pairs, 1283 based on Foata normal form. 2/10742 useless extension candidates. Maximal degree in co-relation 73444. Up to 6708 conditions per place. [2024-11-07 19:32:42,175 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 261 selfloop transitions, 153 changer transitions 16/436 dead transitions. [2024-11-07 19:32:42,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 436 transitions, 8011 flow [2024-11-07 19:32:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:32:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:32:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 433 transitions. [2024-11-07 19:32:42,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6311953352769679 [2024-11-07 19:32:42,177 INFO L175 Difference]: Start difference. First operand has 187 places, 348 transitions, 6269 flow. Second operand 14 states and 433 transitions. [2024-11-07 19:32:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 436 transitions, 8011 flow [2024-11-07 19:32:42,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 436 transitions, 7786 flow, removed 79 selfloop flow, removed 14 redundant places. [2024-11-07 19:32:42,537 INFO L231 Difference]: Finished difference. Result has 186 places, 348 transitions, 6667 flow [2024-11-07 19:32:42,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6667, PETRI_PLACES=186, PETRI_TRANSITIONS=348} [2024-11-07 19:32:42,537 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 138 predicate places. [2024-11-07 19:32:42,537 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 348 transitions, 6667 flow [2024-11-07 19:32:42,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 23.52173913043478) internal successors, (541), 23 states have internal predecessors, (541), 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 19:32:42,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:42,538 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:42,550 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 19:32:42,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:42,738 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:42,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1817206679, now seen corresponding path program 1 times [2024-11-07 19:32:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055045761] [2024-11-07 19:32:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:32:42,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:42,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055045761] [2024-11-07 19:32:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055045761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202117884] [2024-11-07 19:32:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:42,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:42,842 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 19:32:42,843 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 19:32:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:42,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:32:42,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:32:43,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:32:43,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202117884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:43,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:43,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:32:43,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169431101] [2024-11-07 19:32:43,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:43,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:32:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:32:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:32:43,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:43,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 348 transitions, 6667 flow. Second operand has 13 states, 13 states have (on average 25.076923076923077) internal successors, (326), 13 states have internal predecessors, (326), 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 19:32:43,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:44,656 INFO L124 PetriNetUnfolderBase]: 6477/9858 cut-off events. [2024-11-07 19:32:44,656 INFO L125 PetriNetUnfolderBase]: For 158056/158056 co-relation queries the response was YES. [2024-11-07 19:32:44,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68383 conditions, 9858 events. 6477/9858 cut-off events. For 158056/158056 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 57194 event pairs, 720 based on Foata normal form. 186/10035 useless extension candidates. Maximal degree in co-relation 68278. Up to 3581 conditions per place. [2024-11-07 19:32:44,766 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 469 selfloop transitions, 25 changer transitions 0/500 dead transitions. [2024-11-07 19:32:44,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 500 transitions, 10253 flow [2024-11-07 19:32:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:32:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:32:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-11-07 19:32:44,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2024-11-07 19:32:44,768 INFO L175 Difference]: Start difference. First operand has 186 places, 348 transitions, 6667 flow. Second operand 9 states and 260 transitions. [2024-11-07 19:32:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 500 transitions, 10253 flow [2024-11-07 19:32:45,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 500 transitions, 9492 flow, removed 54 selfloop flow, removed 22 redundant places. [2024-11-07 19:32:45,166 INFO L231 Difference]: Finished difference. Result has 165 places, 326 transitions, 5523 flow [2024-11-07 19:32:45,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5523, PETRI_PLACES=165, PETRI_TRANSITIONS=326} [2024-11-07 19:32:45,167 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 117 predicate places. [2024-11-07 19:32:45,167 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 326 transitions, 5523 flow [2024-11-07 19:32:45,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.076923076923077) internal successors, (326), 13 states have internal predecessors, (326), 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 19:32:45,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:45,167 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:45,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-07 19:32:45,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-07 19:32:45,371 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:45,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 609187568, now seen corresponding path program 1 times [2024-11-07 19:32:45,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836183875] [2024-11-07 19:32:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:32:45,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:45,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836183875] [2024-11-07 19:32:45,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836183875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686436200] [2024-11-07 19:32:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:45,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:45,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:45,481 INFO L229 MonitoredProcess]: Starting monitored process 22 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 19:32:45,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-07 19:32:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:45,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:32:45,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:32:45,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:32:45,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686436200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:45,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:45,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:32:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261175267] [2024-11-07 19:32:45,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:45,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:32:45,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:45,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:32:45,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:32:45,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-07 19:32:45,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 326 transitions, 5523 flow. Second operand has 13 states, 13 states have (on average 24.692307692307693) internal successors, (321), 13 states have internal predecessors, (321), 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 19:32:45,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:45,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-07 19:32:45,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:47,021 INFO L124 PetriNetUnfolderBase]: 6944/10570 cut-off events. [2024-11-07 19:32:47,021 INFO L125 PetriNetUnfolderBase]: For 154939/154945 co-relation queries the response was YES. [2024-11-07 19:32:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69943 conditions, 10570 events. 6944/10570 cut-off events. For 154939/154945 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 61956 event pairs, 908 based on Foata normal form. 186/10740 useless extension candidates. Maximal degree in co-relation 69851. Up to 3952 conditions per place. [2024-11-07 19:32:47,115 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 453 selfloop transitions, 23 changer transitions 0/482 dead transitions. [2024-11-07 19:32:47,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 482 transitions, 9121 flow [2024-11-07 19:32:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:32:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:32:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-11-07 19:32:47,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5963718820861678 [2024-11-07 19:32:47,116 INFO L175 Difference]: Start difference. First operand has 165 places, 326 transitions, 5523 flow. Second operand 9 states and 263 transitions. [2024-11-07 19:32:47,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 482 transitions, 9121 flow [2024-11-07 19:32:47,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 482 transitions, 9035 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-07 19:32:47,362 INFO L231 Difference]: Finished difference. Result has 166 places, 308 transitions, 5078 flow [2024-11-07 19:32:47,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5078, PETRI_PLACES=166, PETRI_TRANSITIONS=308} [2024-11-07 19:32:47,363 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 118 predicate places. [2024-11-07 19:32:47,363 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 308 transitions, 5078 flow [2024-11-07 19:32:47,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.692307692307693) internal successors, (321), 13 states have internal predecessors, (321), 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 19:32:47,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:47,364 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:47,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-07 19:32:47,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-07 19:32:47,564 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:47,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1932367191, now seen corresponding path program 1 times [2024-11-07 19:32:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119499072] [2024-11-07 19:32:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119499072] [2024-11-07 19:32:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119499072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006833431] [2024-11-07 19:32:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:48,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:48,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:48,618 INFO L229 MonitoredProcess]: Starting monitored process 23 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 19:32:48,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-07 19:32:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:48,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-07 19:32:48,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:49,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:32:49,113 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 31 treesize of output 11 [2024-11-07 19:32:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:32:49,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:49,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:32:49,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2024-11-07 19:32:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:32:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006833431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:49,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 40 [2024-11-07 19:32:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067354222] [2024-11-07 19:32:49,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:49,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-07 19:32:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-07 19:32:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2024-11-07 19:32:52,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-07 19:32:52,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 308 transitions, 5078 flow. Second operand has 40 states, 40 states have (on average 22.325) internal successors, (893), 40 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:52,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:52,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-07 19:32:52,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:57,560 INFO L124 PetriNetUnfolderBase]: 15010/22455 cut-off events. [2024-11-07 19:32:57,560 INFO L125 PetriNetUnfolderBase]: For 340458/340458 co-relation queries the response was YES. [2024-11-07 19:32:57,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150603 conditions, 22455 events. 15010/22455 cut-off events. For 340458/340458 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 134921 event pairs, 1076 based on Foata normal form. 1/22445 useless extension candidates. Maximal degree in co-relation 150510. Up to 8948 conditions per place. [2024-11-07 19:32:57,772 INFO L140 encePairwiseOnDemand]: 32/49 looper letters, 486 selfloop transitions, 550 changer transitions 1/1040 dead transitions. [2024-11-07 19:32:57,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1040 transitions, 17317 flow [2024-11-07 19:32:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-07 19:32:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-07 19:32:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1617 transitions. [2024-11-07 19:32:57,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-07 19:32:57,775 INFO L175 Difference]: Start difference. First operand has 166 places, 308 transitions, 5078 flow. Second operand 54 states and 1617 transitions. [2024-11-07 19:32:57,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1040 transitions, 17317 flow [2024-11-07 19:32:58,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1040 transitions, 17214 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:32:58,246 INFO L231 Difference]: Finished difference. Result has 233 places, 732 transitions, 15575 flow [2024-11-07 19:32:58,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=15575, PETRI_PLACES=233, PETRI_TRANSITIONS=732} [2024-11-07 19:32:58,247 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 185 predicate places. [2024-11-07 19:32:58,247 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 732 transitions, 15575 flow [2024-11-07 19:32:58,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 22.325) internal successors, (893), 40 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:58,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:58,247 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:58,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-07 19:32:58,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-07 19:32:58,448 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-07 19:32:58,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2097551179, now seen corresponding path program 2 times [2024-11-07 19:32:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:58,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030283219] [2024-11-07 19:32:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030283219] [2024-11-07 19:32:59,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030283219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307129044] [2024-11-07 19:32:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:59,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:59,608 INFO L229 MonitoredProcess]: Starting monitored process 24 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 19:32:59,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-07 19:32:59,702 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:32:59,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:59,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-07 19:32:59,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:59,727 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 19:33:00,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:00,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2024-11-07 19:33:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:00,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:01,355 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 31 treesize of output 27 [2024-11-07 19:33:01,372 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:33:01,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 41 [2024-11-07 19:33:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307129044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:01,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 46 [2024-11-07 19:33:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693176351] [2024-11-07 19:33:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:01,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-07 19:33:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-07 19:33:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2024-11-07 19:33:05,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-07 19:33:05,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 732 transitions, 15575 flow. Second operand has 47 states, 47 states have (on average 22.04255319148936) internal successors, (1036), 47 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:05,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:05,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-07 19:33:05,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand